| ǀXam | xam | Extinct |
| ǁXegwi | xeg | Extinct |
| ǂ’Amkoe | huc | Living |
| Aari | aiw | Living |
| Aasáx | aas | Living |
| Abadi | kbt | Living |
| Abaga | abg | Living |
| Abai Sungai | abf | Living |
| Abanyom | abm | Living |
| Abar | mij | Living |
| Abau | aau | Living |
| Abaza | abq | Living |
| Abé | aba | Living |
| Abellen Ayta | abp | Living |
| Abidji | abi | Living |
| Abinomn | bsa | Living |
| Abipon | axb | Extinct |
| Abishira | ash | Extinct |
| Abkhazian | abk | Living |
| Abom | aob | Living |
| Abon | abo | Living |
| Abron | abr | Living |
| Abu | ado | Living |
| Abu' Arapesh | aah | Living |
| Abua | abn | Living |
| Abui | abz | Living |
| Abun | kgr | Living |
| Abure | abu | Living |
| Abureni | mgj | Living |
| Acatepec Me'phaa | tpx | Living |
| Achagua | aca | Living |
| Achang | acn | Living |
| Ache | yif | Living |
| Aché | guq | Living |
| Acheron | acz | Living |
| Achi | acr | Living |
| Achinese | ace | Living |
| Achterhoeks | act | Living |
| Achuar-Shiwiar | acu | Living |
| Achumawi | acv | Living |
| Acoli | ach | Living |
| Acroá | acs | Extinct |
| Adabe | adb | Living |
| Adai | xad | Extinct |
| Adamawa Fulfulde | fub | Living |
| Adamorobe Sign Language | ads | Living |
| Adang | adn | Living |
| Adangbe | adq | Living |
| Adangme | ada | Living |
| Adara | kad | Living |
| Adasen | tiu | Living |
| Adele | ade | Living |
| Adhola | adh | Living |
| Adi | adi | Living |
| Adioukrou | adj | Living |
| Adithinngithigh | dth | Extinct |
| Adivasi Oriya | ort | Living |
| Adiwasi Garasia | gas | Living |
| Adnyamathanha | adt | Living |
| Adonara | adr | Living |
| Aduge | adu | Living |
| Adyghe | ady | Living |
| Adzera | adz | Living |
| Aeka | aez | Living |
| Aekyom | awi | Living |
| Aequian | xae | Ancient |
| Aer | aeq | Living |
| Afade | aal | Living |
| Afar | aar | Living |
| Afghan Sign Language | afg | Living |
| Afitti | aft | Living |
| Afrihili | afh | Constructed |
| Afrikaans | afr | Living |
| Afro-Seminole Creole | afs | Living |
| Agarabi | agd | Living |
| Agariya | agi | Living |
| Agatu | agc | Living |
| Agavotaguerra | avo | Extinct |
| Aghem | agq | Living |
| Aghu | ahh | Living |
| Aghul | agx | Living |
| Aghu-Tharnggala | gtu | Extinct |
| Aghwan | xag | Extinct |
| Agi | aif | Living |
| Agob | kit | Living |
| Agoi | ibm | Living |
| Aguacateco | agu | Living |
| Aguano | aga | Extinct |
| Aguaruna | agr | Living |
| Aguna | aug | Living |
| Agusan Manobo | msm | Living |
| Agutaynen | agn | Living |
| Agwagwune | yay | Living |
| Àhàn | ahn | Living |
| Ahanta | aha | Living |
| Aheu | thm | Living |
| Ahirani | ahr | Living |
| Ahom | aho | Extinct |
| Ahtena | aht | Living |
| Ahwai | nfd | Living |
| Ai-Cham | aih | Living |
| Aighon | aix | Living |
| Aikanã | tba | Living |
| Aiklep | mwg | Living |
| Aimaq | aiq | Living |
| Aimele | ail | Living |
| Aimol | aim | Living |
| Ainbai | aic | Living |
| Ainu (China) | aib | Living |
| Ainu (Japan) | ain | Living |
| Aiome | aki | Living |
| Airoran | air | Living |
| Aiton | aio | Living |
| Aja (Benin) | ajg | Living |
| Aja (Sudan) | aja | Living |
| Ajawa | ajw | Extinct |
| Ajië | aji | Living |
| Ajumbu | muc | Living |
| Ajyíninka Apurucayali | cpc | Living |
| Ak | akq | Living |
| Aka | soh | Living |
| Aka-Bea | abj | Extinct |
| Aka-Bo | akm | Extinct |
| Aka-Cari | aci | Extinct |
| Aka-Jeru | akj | Extinct |
| Aka-Kede | akx | Extinct |
| Aka-Kol | aky | Extinct |
| Aka-Kora | ack | Extinct |
| Akan | aka | Living |
| Akar-Bale | acl | Extinct |
| Akaselem | aks | Living |
| Akawaio | ake | Living |
| Ake | aik | Living |
| Akebu | keu | Living |
| Akei | tsr | Living |
| Akeu | aeu | Living |
| Akha | ahk | Living |
| Akhvakh | akv | Living |
| Akkadian | akk | Ancient |
| Akkala Sami | sia | Extinct |
| Aklanon | akl | Living |
| Akolet | akt | Living |
| Akoose | bss | Living |
| Akoye | miw | Living |
| Akpa | akf | Living |
| Akpes | ibe | Living |
| Akrukay | afi | Living |
| Akukem | spm | Living |
| Akuku | ayk | Living |
| Akum | aku | Living |
| Akuntsu | aqz | Living |
| Akurio | ako | Living |
| Akwa | akw | Living |
| Akyaung Ari Naga | nqy | Living |
| Alaba-K’abeena | alw | Living |
| Alabama | akz | Living |
| Alabat Island Agta | dul | Living |
| Alacatlatzala Mixtec | mim | Living |
| Alago | ala | Living |
| Alagwa | wbj | Living |
| Alak | alk | Living |
| Alamblak | amp | Living |
| Alangan | alj | Living |
| Alanic | xln | Ancient |
| Alapmunte | apv | Extinct |
| Alawa | alh | Living |
| Albanian | sqi | Living |
| Albanian Sign Language | sqk | Living |
| Alcozauca Mixtec | xta | Living |
| Alege | alf | Living |
| Alekano | gah | Living |
| Aleut | ale | Living |
| Algerian Arabic | arq | Living |
| Algerian Saharan Arabic | aao | Living |
| Algerian Sign Language | asp | Living |
| Algonquin | alq | Living |
| Ali | aiy | Living |
| Alladian | ald | Living |
| Allar | all | Living |
| Alngith | aid | Extinct |
| Alo Phola | ypo | Living |
| Aloápam Zapotec | zaq | Living |
| Alor | aol | Living |
| Al-Sayyid Bedouin Sign Language | syy | Living |
| Alsea | aes | Extinct |
| Alu Kurumba | xua | Living |
| Alugu | aub | Living |
| Alumu-Tesu | aab | Living |
| Alune | alp | Living |
| Aluo | yna | Living |
| Alur | alz | Living |
| Alutor | alr | Living |
| Alviri-Vidari | avd | Living |
| Alyawarr | aly | Living |
| Ama (Papua New Guinea) | amm | Living |
| Ama (Sudan) | nyi | Living |
| Amahai | amq | Living |
| Amahuaca | amc | Living |
| Amaimon | ali | Living |
| Amal | aad | Living |
| Amanab | amn | Living |
| Amanayé | ama | Extinct |
| Amara | aie | Living |
| Amarakaeri | amr | Living |
| Amarasi | aaz | Living |
| Amatlán Zapotec | zpo | Living |
| Amba (Solomon Islands) | utp | Living |
| Amba (Uganda) | rwm | Living |
| Ambai | amk | Living |
| Ambakich | aew | Living |
| Ambala Ayta | abc | Living |
| Ambelau | amv | Living |
| Ambele | ael | Living |
| Amblong | alm | Living |
| Ambo | amb | Living |
| Ambonese Malay | abs | Living |
| Ambo-Pasco Quechua | qva | Living |
| Ambrak | aag | Living |
| Ambul | apo | Living |
| Ambulas | abt | Living |
| Amdang | amj | Living |
| Amdo Tibetan | adx | Living |
| Amele | aey | Living |
| American Sign Language | ase | Living |
| Amganad Ifugao | ifa | Living |
| Amharic | amh | Living |
| Ami | amy | Living |
| Amis | ami | Living |
| Amo | amo | Living |
| Amol | alx | Living |
| Amoltepec Mixtec | mbz | Living |
| Ampanang | apg | Living |
| Ampari Dogon | aqd | Living |
| Amri Karbi | ajz | Living |
| Amto | amt | Living |
| Amundava | adw | Living |
| Amurdak | amg | Living |
| Ana Tinga Dogon | dti | Living |
| Anaang | anw | Living |
| Anakalangu | akg | Living |
| Anal | anm | Living |
| Anam | pda | Living |
| Anambé | aan | Living |
| Anamgura | imi | Living |
| Anasi | bpo | Living |
| Áncá | acb | Living |
| Ancient Greek (to 1453) | grc | Historic |
| Ancient Hebrew | hbo | Historic |
| Ancient Macedonian | xmk | Ancient |
| Ancient North Arabian | xna | Ancient |
| Ancient Zapotec | xzp | Historic |
| Andaandi | dgl | Living |
| Andai | afd | Living |
| Andajin | ajn | Living |
| Andalusian Arabic | xaa | Historic |
| Andaman Creole Hindi | hca | Living |
| Andaqui | ana | Extinct |
| Andarum | aod | Living |
| Andegerebinha | adg | Living |
| Andh | anr | Living |
| Andi | ani | Living |
| Andio | bzb | Living |
| Andoa | anb | Extinct |
| Andoque | ano | Living |
| Andra-Hus | anx | Living |
| Aneityum | aty | Living |
| Anem | anz | Living |
| Aneme Wake | aby | Living |
| Anfillo | myo | Living |
| Angaataha | agm | Living |
| Angaité | aqt | Living |
| Angal | age | Living |
| Angal Enen | aoe | Living |
| Angal Heneng | akh | Living |
| Angami Naga | njm | Living |
| Angguruk Yali | yli | Living |
| Angika | anp | Living |
| Angkamuthi | avm | Extinct |
| Anglo-Norman | xno | Historic |
| Angloromani | rme | Living |
| Angolar | aoa | Living |
| Angor | agg | Living |
| Angoram | aog | Living |
| Angosturas Tunebo | tnd | Living |
| Anguthimri | awg | Extinct |
| Ani Phowa | ypn | Living |
| Anii | blo | Living |
| Animere | anf | Living |
| Anindilyakwa | aoi | Living |
| Anjam | boj | Living |
| Ankave | aak | Living |
| Anmatyerre | amx | Living |
| Anong | nun | Living |
| Anor | anj | Living |
| Anserma | ans | Extinct |
| Ansus | and | Living |
| Antakarinya | ant | Living |
| Antankarana Malagasy | xmv | Living |
| Antigua and Barbuda Creole English | aig | Living |
| Anuak | anu | Living |
| Anufo | cko | Living |
| Anu-Hkongso Chin | anl | Living |
| Anuki | aui | Living |
| Anus | auq | Living |
| Anuta | aud | Living |
| Anyin | any | Living |
| Anyin Morofo | mtb | Living |
| Ao Naga | njo | Living |
| Aoheng | pni | Living |
| Aore | aor | Extinct |
| A'ou | aou | Living |
| Ap Ma | kbx | Living |
| Apalachee | xap | Extinct |
| Apalaí | apy | Living |
| Apali | ena | Living |
| Apasco-Apoala Mixtec | mip | Living |
| Apatani | apt | Living |
| Apiaká | api | Living |
| Apinayé | apn | Living |
| Apma | app | Living |
| Aproumu Aizi | ahp | Living |
| A-Pucikwar | apq | Living |
| Apurinã | apu | Living |
| Aputai | apx | Living |
| Aquitanian | xaq | Ancient |
| Arabana | ard | Extinct |
| Arabela | arl | Living |
| Arabic | ara | Living |
| Aragonese | arg | Living |
| Araki | akr | Living |
| Arakwal | rkw | Extinct |
| Aralle-Tabulahan | atq | Living |
| Arammba | stk | Living |
| Aranadan | aaf | Living |
| Aranama-Tamique | xrt | Extinct |
| Arandai | jbj | Living |
| Araona | aro | Living |
| Arapaho | arp | Living |
| Arapaso | arj | Extinct |
| Ararandewára | xaj | Extinct |
| Arawak | arw | Living |
| Araweté | awt | Living |
| Arawum | awm | Living |
| Arbëreshë Albanian | aae | Living |
| Arbore | arv | Living |
| Archi | aqc | Living |
| Ardhamagadhi Prakrit | pka | Historic |
| Are | mwc | Living |
| 'Are'are | alu | Living |
| Areba | aea | Extinct |
| Arem | aem | Living |
| Arequipa-La Unión Quechua | qxu | Living |
| Argentine Sign Language | aed | Living |
| Argobba | agj | Living |
| Arguni | agf | Living |
| Arhâ | aqr | Living |
| Arhö | aok | Living |
| Arhuaco | arh | Living |
| Ari | aac | Living |
| Aribwatsa | laz | Extinct |
| Aribwaung | ylu | Living |
| Arifama-Miniafia | aai | Living |
| Arigidi | aqg | Living |
| Arikapú | ark | Living |
| Arikara | ari | Living |
| Arikem | ait | Extinct |
| Arin | xrn | Extinct |
| Aringa | luc | Living |
| Arma | aoh | Extinct |
| Armazic | xrm | Extinct |
| Armenian | hye | Living |
| Armenian Sign Language | aen | Living |
| Arop-Lokep | apr | Living |
| Arop-Sissano | aps | Living |
| Arosi | aia | Living |
| Arpitan | frp | Living |
| Arritinngithigh | rrt | Extinct |
| Arta | atz | Living |
| Aruá (Amazonas State) | aru | Extinct |
| Aruá (Rodonia State) | arx | Living |
| Aruamu | msy | Living |
| Aruek | aur | Living |
| Aruop | lsr | Living |
| Arutani | atx | Living |
| Arvanitika Albanian | aat | Living |
| As | asz | Living |
| Asaro'o | mtv | Living |
| Asas | asd | Living |
| Asháninka | cni | Living |
| Ashe | ahs | Living |
| Ashéninka Pajonal | cjo | Living |
| Ashéninka Perené | prq | Living |
| Ashkun | ask | Living |
| Asho Chin | csh | Living |
| Ashtiani | atn | Living |
| Asilulu | asl | Living |
| Askopan | eiv | Living |
| Asoa | asv | Living |
| Assamese | asm | Living |
| Assan | xss | Extinct |
| Assangori | sjg | Living |
| Assiniboine | asb | Living |
| Assyrian Neo-Aramaic | aii | Living |
| Asturian | ast | Living |
| Asu (Nigeria) | aum | Living |
| Asu (Tanzania) | asa | Living |
| Asue Awyu | psa | Living |
| Asumboa | aua | Living |
| Asunción Mixtepec Zapotec | zoo | Living |
| Asuri | asr | Living |
| Ata | atm | Living |
| Ata Manobo | atd | Living |
| Atakapa | aqp | Extinct |
| Atampaya | amz | Extinct |
| Atatláhuca Mixtec | mib | Living |
| Atayal | tay | Living |
| Atemble | ate | Living |
| Athpariya | aph | Living |
| Ati | atk | Living |
| Atikamekw | atj | Living |
| Atohwaim | aqm | Living |
| Atong (Cameroon) | ato | Living |
| Atong (India) | aot | Living |
| Atorada | aox | Living |
| Atsahuaca | atc | Extinct |
| Atsam | cch | Living |
| Atsugewi | atw | Living |
| Attapady Kurumba | pkr | Living |
| Attié | ati | Living |
| Atzingo Matlatzinca | ocu | Living |
| Au | avt | Living |
| 'Auhelawa | kud | Living |
| Aulua | aul | Living |
| Aurá | aux | Extinct |
| Aushi | auh | Living |
| Aushiri | avs | Extinct |
| Austral | aut | Living |
| Australian Aborigines Sign Language | asw | Living |
| Australian Sign Language | asf | Living |
| Austrian Sign Language | asq | Living |
| Auwe | smf | Living |
| Auye | auu | Living |
| Auyokawa | auo | Extinct |
| Avá-Canoeiro | avv | Living |
| Avaric | ava | Living |
| Avatime | avn | Living |
| Avau | avb | Living |
| Avestan | ave | Ancient |
| Avikam | avi | Living |
| Avokaya | avu | Living |
| Awa (China) | vwa | Living |
| Awa (Papua New Guinea) | awb | Living |
| Awabakal | awk | Extinct |
| Awa-Cuaiquer | kwi | Living |
| Awad Bing | bcu | Living |
| Awadhi | awa | Living |
| Awak | awo | Living |
| Awar | aya | Living |
| Awara | awx | Living |
| Awbono | awh | Living |
| Aweer | bob | Living |
| Awera | awr | Living |
| Awetí | awe | Living |
| Awing | azo | Living |
| Awiyaana | auy | Living |
| Awjilah | auj | Living |
| Awngi | awn | Living |
| Awngthim | gwm | Extinct |
| Awtuw | kmn | Living |
| Awu | yiu | Living |
| Awun | aww | Living |
| Awutu | afu | Living |
| Awyi | auw | Living |
| Axamb | ahb | Living |
| Axi Yi | yix | Living |
| Ayabadhu | ayd | Extinct |
| Ayacucho Quechua | quy | Living |
| Ayautla Mazatec | vmy | Living |
| Ayere | aye | Living |
| Ayerrerenge | axe | Extinct |
| Ayi (Papua New Guinea) | ayq | Living |
| Ayiwo | nfl | Living |
| Ayizi | yyz | Living |
| Ayizo Gbe | ayb | Living |
| Aymara | aym | Living |
| Ayoquesco Zapotec | zaf | Living |
| Ayoreo | ayo | Living |
| Ayu | ayu | Living |
| Ayutla Mixtec | miy | Living |
| Azerbaijani | aze | Living |
| Azha | aza | Living |
| Azhe | yiz | Living |
| Azoyú Me'phaa | tpc | Living |
| Baan | bvj | Living |
| Baangi | bqx | Living |
| Baatonum | bba | Living |
| Baba | bbw | Living |
| Baba Malay | mbf | Living |
| Babalia Creole Arabic | bbz | Living |
| Babango | bbm | Living |
| Babanki | bbk | Living |
| Babatana | baa | Living |
| Babine | bcr | Living |
| Babuza | bzg | Living |
| Bacama | bcy | Living |
| Bacanese Malay | btj | Living |
| Bactrian | xbc | Ancient |
| Bada (Indonesia) | bhz | Living |
| Bada (Nigeria) | bau | Living |
| Badaga | bfq | Living |
| Bade | bde | Living |
| Badeshi | bdz | Living |
| Bädi Kanum | khd | Living |
| Badimaya | bia | Living |
| Badjiri | jbi | Extinct |
| Badui | bac | Living |
| Badyara | pbp | Living |
| Baeggu | bvd | Living |
| Baelelea | bvc | Living |
| Baetora | btr | Living |
| Bafanji | bfj | Living |
| Bafaw-Balong | bwt | Living |
| Bafia | ksf | Living |
| Bafut | bfd | Living |
| Baga Binari | bcg | Living |
| Baga Kaloum | bqf | Extinct |
| Baga Koga | bgo | Living |
| Baga Manduri | bmd | Living |
| Baga Mboteni | bgm | Living |
| Baga Sitemu | bsp | Living |
| Baga Sobané | bsv | Extinct |
| Bagheli | bfy | Living |
| Bagirmi | bmi | Living |
| Bagirmi Fulfulde | fui | Living |
| Bago-Kusuntu | bqg | Living |
| Bagri | bgq | Living |
| Bagupi | bpi | Living |
| Bagusa | bqb | Living |
| Bagvalal | kva | Living |
| Baha Buyang | yha | Living |
| Baham | bdw | Living |
| Bahamas Creole English | bah | Living |
| Baharna Arabic | abv | Living |
| Bahau | bhv | Living |
| Bahinemo | bjh | Living |
| Bahing | bhj | Living |
| Bahnar | bdq | Living |
| Bahonsuai | bsu | Living |
| Bai | bdj | Living |
| Baibai | bbf | Living |
| Baikeno | bkx | Living |
| Baima | bqh | Living |
| Baimak | bmx | Living |
| Bainouk-Gunyaamolo | bcz | Living |
| Bainouk-Gunyuño | bab | Living |
| Bainouk-Samik | bcb | Living |
| Baiso | bsw | Living |
| Baissa Fali | fah | Living |
| Bajan | bjs | Living |
| Bajelani | bjm | Living |
| Baka (Cameroon) | bkc | Living |
| Baka (Sudan) | bdh | Living |
| Bakairí | bkq | Living |
| Bakaka | bqz | Living |
| Bakhtiari | bqi | Living |
| Baki | bki | Living |
| Bakoko | bkh | Living |
| Bakole | kme | Living |
| Bakpinka | bbs | Living |
| Bakumpai | bkr | Living |
| Bakwé | bjw | Living |
| Balaesang | bls | Living |
| Balangao | blw | Living |
| Balangingi | sse | Living |
| Balanta-Ganja | bjt | Living |
| Balantak | blz | Living |
| Balanta-Kentohe | ble | Living |
| Balau | blg | Living |
| Baldemu | bdn | Living |
| Bali (Democratic Republic of Congo) | bcp | Living |
| Bali (Nigeria) | bcn | Living |
| Balinese | ban | Living |
| Balinese Malay | mhp | Living |
| Balkan Gagauz Turkish | bgx | Living |
| Balkan Romani | rmn | Living |
| Balo | bqo | Living |
| Baloi | biz | Living |
| Balti | bft | Living |
| Baltic Romani | rml | Living |
| Baluan-Pam | blq | Living |
| Baluchi | bal | Living |
| Bamako Sign Language | bog | Living |
| Bamali | bbq | Living |
| Bambalang | bmo | Living |
| Bambam | ptu | Living |
| Bambara | bam | Living |
| Bambassi | myf | Living |
| Bambili-Bambui | baw | Living |
| Bamenyam | bce | Living |
| Bamu | bcf | Living |
| Bamukumbit | bqt | Living |
| Bamun | bax | Living |
| Bamunka | bvm | Living |
| Bamwe | bmg | Living |
| Ban Khor Sign Language | bfk | Living |
| Bana | bcw | Living |
| Banao Itneg | bjx | Living |
| Banaro | byz | Living |
| Banda (Indonesia) | bnd | Living |
| Banda Malay | bpq | Living |
| Banda-Bambari | liy | Living |
| Banda-Banda | bpd | Living |
| Banda-Mbrès | bqk | Living |
| Banda-Ndélé | bfl | Living |
| Banda-Yangere | yaj | Living |
| Bandi | bza | Living |
| Bandial | bqj | Living |
| Bandjalang | bdy | Living |
| Bangala | bxg | Living |
| Bangandu | bgf | Living |
| Bangba | bbe | Living |
| Banggai | bgz | Living |
| Banggarla | bjb | Extinct |
| Bangi | bni | Living |
| Bangime | dba | Living |
| Bangka | mfb | Living |
| Bangolan | bgj | Living |
| Bangubangu | bnx | Living |
| Bangwinji | bsj | Living |
| Baniva | bvv | Extinct |
| Baniwa | bwi | Living |
| Banjar | bjn | Living |
| Bankagooma | bxw | Living |
| Bankal | jjr | Living |
| Bankan Tey Dogon | dbw | Living |
| Bankon | abb | Living |
| Bannoni | bcm | Living |
| Bantawa | bap | Living |
| Bantayanon | bfx | Living |
| Bantik | bnq | Living |
| Bantoanon | bno | Living |
| Baoulé | bci | Living |
| Bara Malagasy | bhr | Living |
| Baraamu | brd | Living |
| Barababaraba | rbp | Extinct |
| Barai | bbb | Living |
| Barakai | baj | Living |
| Baram Kayan | kys | Living |
| Barama | bbg | Living |
| Barambu | brm | Living |
| Baramu | bmz | Living |
| Barapasi | brp | Living |
| Baras | brs | Living |
| Barasana-Eduria | bsn | Living |
| Barbacoas | bpb | Extinct |
| Barbaram | vmb | Extinct |
| Barbareño | boi | Extinct |
| Barclayville Grebo | gry | Living |
| Bardi | bcj | Living |
| Baré | bae | Extinct |
| Barein | bva | Living |
| Bargam | mlp | Living |
| Bari | bfa | Living |
| Barí | mot | Living |
| Bariai | bch | Living |
| Bariji | bjc | Living |
| Barikanchi | bxo | Living |
| Barikewa | jbk | Living |
| Barok | bjk | Living |
| Barombi | bbi | Living |
| Barro Negro Tunebo | tbn | Living |
| Barrow Point | bpt | Extinct |
| Baruga | bjz | Living |
| Baruya | byr | Living |
| Barwe | bwg | Living |
| Barzani Jewish Neo-Aramaic | bjf | Living |
| Basa (Cameroon) | bas | Living |
| Basa (Nigeria) | bzw | Living |
| Basa-Gumna | bsl | Extinct |
| Basa-Gurmana | buj | Living |
| Basap | bdb | Living |
| Basay | byq | Extinct |
| Bashkardi | bsg | Living |
| Bashkir | bak | Living |
| Basketo | bst | Living |
| Basque | eus | Living |
| Bassa | bsq | Living |
| Bassa-Kontagora | bsr | Living |
| Bassari | bsc | Living |
| Bassossi | bsi | Living |
| Bata | bta | Living |
| Batad Ifugao | ifb | Living |
| Batak | bya | Living |
| Batak Alas-Kluet | btz | Living |
| Batak Angkola | akb | Living |
| Batak Dairi | btd | Living |
| Batak Karo | btx | Living |
| Batak Mandailing | btm | Living |
| Batak Simalungun | bts | Living |
| Batak Toba | bbc | Living |
| Batanga | bnm | Living |
| Batek | btq | Living |
| Bateri | btv | Living |
| Bathari | bhm | Living |
| Bati (Cameroon) | btc | Living |
| Bati (Indonesia) | bvt | Living |
| Bats | bbl | Living |
| Batu | btu | Living |
| Batui | zbt | Living |
| Batuley | bay | Living |
| Batyala | xby | Living |
| Bau | bbd | Living |
| Bau Bidayuh | sne | Living |
| Bauchi | bsf | Living |
| Baure | brg | Living |
| Bauria | bge | Living |
| Bauwaki | bwk | Living |
| Bauzi | bvz | Living |
| Bavarian | bar | Living |
| Bawm Chin | bgr | Living |
| Bay Miwok | mkq | Extinct |
| Bayali | bjy | Extinct |
| Baybayanon | bvy | Living |
| Baygo | byg | Extinct |
| Bayono | byl | Living |
| Bayot | bda | Living |
| Bayungu | bxj | Living |
| Bazigar | bfr | Living |
| Beami | beo | Living |
| Beaver | bea | Living |
| Beba | bfp | Living |
| Bebele | beb | Living |
| Bebeli | bek | Living |
| Bebil | bxp | Living |
| Bedjond | bjv | Living |
| Bedoanas | bed | Living |
| Beeke | bkf | Living |
| Beele | bxq | Living |
| Beembe | beq | Living |
| Beezen | bnz | Living |
| Befang | bby | Living |
| Beja | bej | Living |
| Bekati' | bei | Living |
| Bekwarra | bkv | Living |
| Bekwel | bkw | Living |
| Belait | beg | Living |
| Belanda Bor | bxb | Living |
| Belanda Viri | bvi | Living |
| Belarusian | bel | Living |
| Belhariya | byw | Living |
| Beli (Papua New Guinea) | bey | Living |
| Beli (Sudan) | blm | Living |
| Belize Kriol English | bzj | Living |
| Bella Coola | blc | Living |
| Bellari | brw | Living |
| Bemba (Zambia) | bem | Living |
| Bembe | bmb | Living |
| Ben Tey Dogon | dbt | Living |
| Bena (Nigeria) | yun | Living |
| Bena (Tanzania) | bez | Living |
| Benabena | bef | Living |
| Bench | bcq | Living |
| Bende | bdp | Living |
| Bendi | bct | Living |
| Beng | nhb | Living |
| Benga | bng | Living |
| Bengali | ben | Living |
| Benggoi | bgy | Living |
| Bengkala Sign Language | bqy | Living |
| Bentong | bnu | Living |
| Benyadu' | byd | Living |
| Beothuk | bue | Extinct |
| Bepour | bie | Living |
| Bera | brf | Living |
| Berakou | bxv | Living |
| Berau Malay | bve | Living |
| Berbice Creole Dutch | brc | Extinct |
| Berik | bkl | Living |
| Berinomo | bit | Living |
| Berom | bom | Living |
| Berta | wti | Living |
| Berti | byt | Extinct |
| Besisi | mhe | Living |
| Besme | bes | Living |
| Besoa | bep | Living |
| Betaf | bfe | Living |
| Betawi | bew | Living |
| Bete | byf | Living |
| Bete-Bendi | btt | Living |
| Beti (Côte d'Ivoire) | eot | Living |
| Betta Kurumba | xub | Living |
| Bezhta | kap | Living |
| Bhadrawahi | bhd | Living |
| Bhalay | bhx | Living |
| Bharia | bha | Living |
| Bhatola | btl | Living |
| Bhatri | bgw | Living |
| Bhattiyali | bht | Living |
| Bhaya | bhe | Living |
| Bhele | bhy | Living |
| Bhilali | bhi | Living |
| Bhili | bhb | Living |
| Bhojpuri | bho | Living |
| Bhoti Kinnauri | nes | Living |
| Bhujel | byh | Living |
| Bhunjia | bhu | Living |
| Biafada | bif | Living |
| Biage | bdf | Living |
| Biak | bhw | Living |
| Biali | beh | Living |
| Bian Marind | bpv | Living |
| Biangai | big | Living |
| Biao | byk | Living |
| Biao Mon | bmt | Living |
| Biao-Jiao Mien | bje | Living |
| Biatah Bidayuh | bth | Living |
| Bibbulman | xbp | Extinct |
| Bidhawal | ihw | Extinct |
| Bidiyo | bid | Living |
| Bidyara | bym | Living |
| Bidyogo | bjg | Living |
| Biem | bmc | Living |
| Bierebo | bnk | Living |
| Bieria | brj | Living |
| Biete | biu | Living |
| Big Nambas | nmb | Living |
| Biga | bhc | Living |
| Bigambal | xbe | Extinct |
| Bijori | bix | Living |
| Bikaru | bic | Living |
| Bikol | bik | Living |
| Bikya | byb | Living |
| Bila | bip | Living |
| Bilakura | bql | Living |
| Bilaspuri | kfs | Living |
| Bilba | bpz | Living |
| Bilbil | brz | Living |
| Bile | bil | Living |
| Bilin | byn | Living |
| Bilma Kanuri | bms | Living |
| Biloxi | bll | Extinct |
| Bilua | blb | Living |
| Bilur | bxf | Living |
| Bima | bhp | Living |
| Bimin | bhl | Living |
| Bimoba | bim | Living |
| Bina (Nigeria) | byj | Living |
| Bina (Papua New Guinea) | bmn | Extinct |
| Binahari | bxz | Living |
| Binandere | bhg | Living |
| Bindal | xbd | Extinct |
| Bine | bon | Living |
| Bini | bin | Living |
| Binji | bpj | Living |
| Binongan Itneg | itb | Living |
| Bintauna | bne | Living |
| Bintulu | bny | Living |
| Binukid | bkd | Living |
| Binumarien | bjr | Living |
| Bipi | biq | Living |
| Birale | bxe | Living |
| Birao | brr | Living |
| Birgit | btf | Living |
| Birhor | biy | Living |
| Biri | bzr | Extinct |
| Biritai | bqq | Living |
| Birked | brk | Extinct |
| Birri | bvq | Living |
| Birrpayi | xbj | Extinct |
| Birwa | brl | Living |
| Biseni | ije | Living |
| Bishnupriya | bpy | Living |
| Bishuo | bwh | Living |
| Bisis | bnw | Living |
| Bislama | bis | Living |
| Bisorio | bir | Living |
| Bissa | bib | Living |
| Bisu | bzi | Living |
| Bit | bgk | Living |
| Bitare | brt | Living |
| Bitur | mcc | Living |
| Biwat | bwm | Living |
| Biyo | byo | Living |
| Biyom | bpm | Living |
| Blablanga | blp | Living |
| Blafe | bfh | Living |
| Blagar | beu | Living |
| Blang | blr | Living |
| Blissymbols | zbl | Constructed |
| Bo (Laos) | bgl | Living |
| Bo (Papua New Guinea) | bpw | Living |
| Boano (Maluku) | bzn | Living |
| Boano (Sulawesi) | bzl | Living |
| Bobongko | bgb | Living |
| Bobot | bty | Living |
| Bodo (Central African Republic) | boy | Living |
| Bodo (India) | brx | Living |
| Bodo Gadaba | gbj | Living |
| Bodo Parja | bdv | Living |
| Bofi | bff | Living |
| Boga | bvw | Living |
| Bogaya | boq | Living |
| Boghom | bux | Living |
| Boguru | bqu | Living |
| Bohtan Neo-Aramaic | bhn | Living |
| Boikin | bzf | Living |
| Bokha | ybk | Living |
| Boko (Benin) | bqc | Living |
| Boko (Democratic Republic of Congo) | bkp | Living |
| Bokobaru | bus | Living |
| Bokoto | bdt | Living |
| Bokyi | bky | Living |
| Bola | bnp | Living |
| Bolango | bld | Living |
| Bole | bol | Living |
| Bolgarian | xbo | Extinct |
| Bolgo | bvo | Living |
| Bolia | bli | Living |
| Bolinao | smk | Living |
| Bolivian Sign Language | bvl | Living |
| Bolo | blv | Living |
| Boloki | bkt | Living |
| Bolon | bof | Living |
| Bolondo | bzm | Living |
| Bolongan | blj | Living |
| Bolyu | ply | Living |
| Bom | bmf | Living |
| Boma | boh | Living |
| Bomboli | bml | Living |
| Bomboma | bws | Living |
| Bomitaba | zmx | Living |
| Bomu | bmq | Living |
| Bomwali | bmw | Living |
| Bon Gula | glc | Living |
| Bonan | peh | Living |
| Bondei | bou | Living |
| Bondo | bfw | Living |
| Bondoukou Kulango | kzc | Living |
| Bondum Dom Dogon | dbu | Living |
| Bonerate | bna | Living |
| Bonerif | bnv | Living |
| Bonggi | bdg | Living |
| Bonggo | bpg | Living |
| Bongili | bui | Living |
| Bongo | bot | Living |
| Bongu | bpu | Living |
| Bonjo | bok | Living |
| Bonkeng | bvg | Living |
| Bonkiman | bop | Living |
| Bontok | bnc | Living |
| Bookan | bnb | Living |
| Boon | bnl | Living |
| Boor | bvf | Living |
| Bora | boa | Living |
| Borana-Arsi-Guji Oromo | gax | Living |
| Border Kuna | kvn | Living |
| Borei | gai | Living |
| Borgu Fulfulde | fue | Living |
| Boro (Ethiopia) | bwo | Living |
| Boro (Ghana) | xxb | Extinct |
| Borong | ksr | Living |
| Borôro | bor | Living |
| Boruca | brn | Living |
| Bo-Rukul | mae | Living |
| Boselewa | bwf | Living |
| Bosngun | bqs | Living |
| Bosnian | bos | Living |
| Bote-Majhi | bmj | Living |
| Botlikh | bph | Living |
| Botolan Sambal | sbl | Living |
| Bouna Kulango | nku | Living |
| Bo-Ung | mux | Living |
| Bouyei | pcc | Living |
| Bozaba | bzo | Living |
| Bragat | aof | Living |
| Brahui | brh | Living |
| Braj | bra | Living |
| Brazilian Sign Language | bzs | Living |
| Brem | buq | Living |
| Breri | brq | Living |
| Breton | bre | Living |
| Bribri | bzd | Living |
| Brithenig | bzt | Constructed |
| British Sign Language | bfi | Living |
| Brokkat | bro | Living |
| Brokpake | sgt | Living |
| Brokskat | bkk | Living |
| Brooke's Point Palawano | plw | Living |
| Broome Pearling Lugger Pidgin | bpl | Living |
| Brunei | kxd | Living |
| Brunei Bisaya | bsb | Living |
| Bu | jid | Living |
| Bua | bub | Living |
| Bualkhaw Chin | cbl | Living |
| Buamu | box | Living |
| Bube | bvb | Living |
| Bubi | buw | Living |
| Bubia | bbx | Living |
| Budeh Stieng | stt | Living |
| Budibud | btp | Living |
| Budong-Budong | bdx | Living |
| Budu | buu | Living |
| Budukh | bdk | Living |
| Buduma | bdm | Living |
| Budza | bja | Living |
| Bugan | bbh | Living |
| Bugawac | buk | Living |
| Bughotu | bgt | Living |
| Buginese | bug | Living |
| Buglere | sab | Living |
| Bugun | bgg | Living |
| Buhid | bku | Living |
| Buhi'non Bikol | ubl | Living |
| Buhutu | bxh | Living |
| Bukar-Sadung Bidayuh | sdo | Living |
| Bukat | bvk | Living |
| Bukharic | bhh | Living |
| Bukit Malay | bvu | Living |
| Bukitan | bkn | Living |
| Bukiyip | ape | Living |
| Buksa | tkb | Living |
| Bukusu | bxk | Living |
| Bukwen | buz | Living |
| Bulgarian | bul | Living |
| Bulgarian Sign Language | bqn | Living |
| Bulgebi | bmp | Living |
| Buli (Ghana) | bwu | Living |
| Buli (Indonesia) | bzq | Living |
| Bullom So | buy | Living |
| Bulo Stieng | sti | Living |
| Bulu (Cameroon) | bum | Living |
| Bulu (Papua New Guinea) | bjl | Living |
| Bum | bmv | Living |
| Bumaji | byp | Living |
| Bumang | bvp | Living |
| Bumbita Arapesh | aon | Living |
| Bumthangkha | kjz | Living |
| Bun | buv | Living |
| Buna | bvn | Living |
| Bunaba | bck | Living |
| Bunak | bfn | Living |
| Bunama | bdd | Living |
| Bu-Nao Bunu | bwx | Living |
| Bundeli | bns | Living |
| Bung | bqd | Living |
| Bungain | but | Living |
| Bunganditj | xbg | Extinct |
| Bungku | bkz | Living |
| Bungu | wun | Living |
| Bunoge Dogon | dgb | Living |
| Bunun | bnn | Living |
| Buol | blf | Living |
| Burak | bys | Living |
| Buraka | bkg | Living |
| Bura-Pabir | bwr | Living |
| Burarra | bvr | Living |
| Burate | bti | Living |
| Burduna | bxn | Living |
| Bure | bvh | Living |
| Buriat | bua | Living |
| Burji | bji | Living |
| Burmbar | vrt | Living |
| Burmese | mya | Living |
| Burmeso | bzu | Living |
| Buru (Indonesia) | mhs | Living |
| Buru (Nigeria) | bqw | Living |
| Burui | bry | Living |
| Burumakok | aip | Living |
| Burun | bdi | Living |
| Burunge | bds | Living |
| Burushaski | bsk | Living |
| Burusu | bqr | Living |
| Buruwai | asi | Living |
| Busa | bqp | Living |
| Busam | bxs | Living |
| Busami | bsm | Living |
| Busang Kayan | bfg | Living |
| Bushi | buc | Living |
| Bushoong | buf | Living |
| Buso | bso | Living |
| Busoa | bup | Living |
| Bussa | dox | Living |
| Busuu | bju | Living |
| Butbut Kalinga | kyb | Living |
| Butmas-Tur | bnr | Living |
| Butuanon | btw | Living |
| Buwal | bhs | Living |
| Buyu | byi | Living |
| Buyuan Jinuo | jiy | Living |
| Bwa | bww | Living |
| Bwaidoka | bwd | Living |
| Bwanabwana | tte | Living |
| Bwatoo | bwa | Living |
| Bwe Karen | bwe | Living |
| Bwela | bwl | Living |
| Bwile | bwc | Living |
| Bwisi | bwz | Living |
| Byangsi | bee | Living |
| Byep | mkk | Living |
| Caac | msq | Living |
| Cabécar | cjp | Living |
| Cabiyarí | cbb | Living |
| Cacaloxtepec Mixtec | miu | Living |
| Cacaopera | ccr | Extinct |
| Cacgia Roglai | roc | Living |
| Cacua | cbv | Living |
| Caddo | cad | Living |
| Cafundo Creole | ccd | Living |
| Cagua | cbh | Extinct |
| Cahuarano | cah | Living |
| Cahuilla | chl | Living |
| Cahungwarya | nat | Living |
| Cajamarca Quechua | qvc | Living |
| Cajatambo North Lima Quechua | qvl | Living |
| Cajonos Zapotec | zad | Living |
| Cajun French | frc | Living |
| Caka | ckx | Living |
| Cakchiquel-Quiché Mixed Language | ckz | Living |
| Cakfem-Mushere | cky | Living |
| Calamian Tagbanwa | tbk | Living |
| Calderón Highland Quichua | qud | Living |
| Callawalla | caw | Living |
| Caló | rmq | Living |
| Caluyanun | clu | Living |
| Cameroon Mambila | mcu | Living |
| Cameroon Pidgin | wes | Living |
| Camling | rab | Living |
| Campalagian | cml | Living |
| Campidanese Sardinian | sro | Living |
| Camsá | kbh | Living |
| Camtho | cmt | Living |
| Camunic | xcc | Ancient |
| Cañar Highland Quichua | qxr | Living |
| Candoshi-Shapra | cbu | Living |
| Canela | ram | Living |
| Canichana | caz | Extinct |
| Cao Lan | mlc | Living |
| Cao Miao | cov | Living |
| Capanahua | kaq | Living |
| Capiznon | cps | Living |
| Cappadocian Greek | cpg | Extinct |
| Caquinte | cot | Living |
| Car Nicobarese | caq | Living |
| Cara | cfd | Living |
| Carabayo | cby | Living |
| Caramanta | crf | Extinct |
| Carapana | cbc | Living |
| Carian | xcr | Ancient |
| Caribbean Hindustani | hns | Living |
| Caribbean Javanese | jvn | Living |
| Carijona | cbd | Living |
| Carolina Algonquian | crr | Extinct |
| Carolinian | cal | Living |
| Carpathian Romani | rmc | Living |
| Carrier | crx | Living |
| Cashibo-Cacataibo | cbr | Living |
| Cashinahua | cbs | Living |
| Casiguran Dumagat Agta | dgc | Living |
| Casuarina Coast Asmat | asc | Living |
| Catalan | cat | Living |
| Catalan Sign Language | csc | Living |
| Catawba | chc | Extinct |
| Cauca | cca | Extinct |
| Cavineña | cav | Living |
| Cayubaba | cyb | Extinct |
| Cayuga | cay | Living |
| Cayuse | xcy | Extinct |
| Cebaara Senoufo | sef | Living |
| Cebuano | ceb | Living |
| Celtiberian | xce | Ancient |
| Cemuhî | cam | Living |
| Cen | cen | Living |
| Central Asmat | cns | Living |
| Central Atlas Tamazight | tzm | Living |
| Central Awyu | awu | Living |
| Central Aymara | ayr | Living |
| Central Bai | bca | Living |
| Central Berawan | zbc | Living |
| Central Bikol | bcl | Living |
| Central Bontok | lbk | Living |
| Central Cagayan Agta | agt | Living |
| Central Dusun | dtp | Living |
| Central Grebo | grv | Living |
| Central Hongshuihe Zhuang | zch | Living |
| Central Huasteca Nahuatl | nch | Living |
| Central Huishui Hmong | hmc | Living |
| Central Kanuri | knc | Living |
| Central Khmer | khm | Living |
| Central Kurdish | ckb | Living |
| Central Maewo | mwo | Living |
| Central Malay | pse | Living |
| Central Masela | mxz | Living |
| Central Mashan Hmong | hmm | Living |
| Central Mazahua | maz | Living |
| Central Melanau | mel | Living |
| Central Mnong | cmo | Living |
| Central Nahuatl | nhn | Living |
| Central Nicobarese | ncb | Living |
| Central Ojibwa | ojc | Living |
| Central Okinawan | ryu | Living |
| Central Palawano | plc | Living |
| Central Pame | pbs | Living |
| Central Pashto | pst | Living |
| Central Pomo | poo | Living |
| Central Puebla Nahuatl | ncx | Living |
| Central Sama | sml | Living |
| Central Siberian Yupik | ess | Living |
| Central Sierra Miwok | csm | Living |
| Central Subanen | syb | Living |
| Central Tagbanwa | tgt | Living |
| Central Tarahumara | tar | Living |
| Central Tunebo | tuf | Living |
| Central Yupik | esu | Living |
| Central-Eastern Niger Fulfulde | fuq | Living |
| Centúúm | cet | Living |
| Cerma | cme | Living |
| Chabu | sbf | Living |
| Chachapoyas Quechua | quk | Living |
| Chachi | cbi | Living |
| Chácobo | cao | Living |
| Chadian Arabic | shu | Living |
| Chadian Sign Language | cds | Living |
| Chadong | cdy | Living |
| Chagatai | chg | Extinct |
| Chaima | ciy | Living |
| Chak | ckh | Living |
| Chakali | cli | Living |
| Chakma | ccp | Living |
| Chala | cll | Living |
| Chaldean Neo-Aramaic | cld | Living |
| Chalikha | tgf | Living |
| Chamacoco | ceg | Living |
| Chamalal | cji | Living |
| Chamari | cdg | Living |
| Chambeali | cdh | Living |
| Chambri | can | Living |
| Chamicuro | ccc | Living |
| Chamorro | cha | Living |
| Chané | caj | Extinct |
| Chang Naga | nbc | Living |
| Changriwa | cga | Living |
| Changthang | cna | Living |
| Chantyal | chx | Living |
| Chara | cra | Living |
| Chaudangsi | cdn | Living |
| Chaura | crv | Living |
| Chavacano | cbk | Living |
| Chayahuita | cbt | Living |
| Chayuco Mixtec | mih | Living |
| Chazumba Mixtec | xtb | Living |
| Che | ruk | Living |
| Chechen | che | Living |
| Cheke Holo | mrn | Living |
| Chemakum | xch | Extinct |
| Chenapian | cjn | Living |
| Chenchu | cde | Living |
| Chenoua | cnu | Living |
| Chepang | cdm | Living |
| Chepya | ycp | Living |
| Cherepon | cpn | Living |
| Cherokee | chr | Living |
| Chesu | ych | Living |
| Chetco | ctc | Living |
| Chewong | cwg | Living |
| Cheyenne | chy | Living |
| Chhattisgarhi | hne | Living |
| Chhintange | ctn | Living |
| Chhulung | cur | Living |
| Chiangmai Sign Language | csd | Living |
| Chiapanec | cip | Living |
| Chibcha | chb | Extinct |
| Chicahuaxtla Triqui | trs | Living |
| Chichicapan Zapotec | zpv | Living |
| Chichimeca-Jonaz | pei | Living |
| Chickasaw | cic | Living |
| Chicomuceltec | cob | Extinct |
| Chiga | cgg | Living |
| Chigmecatitlán Mixtec | mii | Living |
| Chilcotin | clc | Living |
| Chilean Quechua | cqu | Living |
| Chilean Sign Language | csg | Living |
| Chilisso | clh | Living |
| Chiltepec Chinantec | csa | Living |
| Chimalapa Zoque | zoh | Living |
| Chimariko | cid | Extinct |
| Chimborazo Highland Quichua | qug | Living |
| Chimila | cbg | Living |
| China Buriat | bxu | Living |
| Chinali | cih | Living |
| Chinbon Chin | cnb | Living |
| Chincha Quechua | qxc | Living |
| Chinese | zho | Living |
| Chinese Pidgin English | cpi | Living |
| Chinese Sign Language | csl | Living |
| Chinook | chh | Living |
| Chinook jargon | chn | Living |
| Chipaya | cap | Living |
| Chipewyan | chp | Living |
| Chipiajes | cbe | Extinct |
| Chippewa | ciw | Living |
| Chiquián Ancash Quechua | qxa | Living |
| Chiquihuitlán Mazatec | maq | Living |
| Chiquitano | cax | Living |
| Chiripá | nhd | Living |
| Chiru | cdf | Living |
| Chitimacha | ctm | Extinct |
| Chitkuli Kinnauri | cik | Living |
| Chittagonian | ctg | Living |
| Chitwania Tharu | the | Living |
| Choapan Zapotec | zpc | Living |
| Chocangacakha | cgk | Living |
| Chochotec | coz | Living |
| Choctaw | cho | Living |
| Chodri | cdi | Living |
| Chokri Naga | nri | Living |
| Chokwe | cjk | Living |
| Chol | ctu | Living |
| Cholón | cht | Extinct |
| Chong | cog | Living |
| Choni | cda | Living |
| Chonyi-Dzihana-Kauma | coh | Living |
| Chopi | cce | Living |
| Chorasmian | xco | Ancient |
| Chortí | caa | Living |
| Chothe Naga | nct | Living |
| Chrau | crw | Living |
| Chru | cje | Living |
| Chuanqiandian Cluster Miao | cqd | Living |
| Chuave | cjv | Living |
| Chug | cvg | Living |
| Chuj | cac | Living |
| Chuka | cuh | Living |
| Chukot | ckt | Living |
| Chukwa | cuw | Living |
| Chulym | clw | Living |
| Chumburung | ncu | Living |
| Churahi | cdj | Living |
| Church Slavic | chu | Ancient |
| Chut | scb | Living |
| Chuukese | chk | Living |
| Chuvantsy | xcv | Extinct |
| Chuvash | chv | Living |
| Chuwabu | chw | Living |
| Ci Gbe | cib | Living |
| Cia-Cia | cia | Living |
| Cibak | ckl | Living |
| Cicipu | awc | Living |
| Cimbrian | cim | Living |
| Cinda-Regi-Tiyal | cdr | Living |
| Cineni | cie | Living |
| Cinta Larga | cin | Living |
| Cisalpine Gaulish | xcg | Ancient |
| Cishingini | asg | Living |
| Citak | txt | Living |
| Ciwogai | tgd | Living |
| Clallam | clm | Living |
| Classical Armenian | xcl | Historic |
| Classical Mandaic | myz | Historic |
| Classical Mongolian | cmg | Historic |
| Classical Nahuatl | nci | Historic |
| Classical Newari | nwc | Historic |
| Classical Quechua | qwc | Historic |
| Classical Syriac | syc | Historic |
| Classical Tibetan | xct | Historic |
| C'lela | dri | Living |
| Coahuilteco | xcw | Extinct |
| Coast Miwok | csi | Extinct |
| Coastal Kadazan | kzj | Living |
| Coastal Konjo | kjc | Living |
| Coatecas Altas Zapotec | zca | Living |
| Coatepec Nahuatl | naz | Living |
| Coatlán Mixe | mco | Living |
| Coatlán Zapotec | zps | Living |
| Coatzospan Mixtec | miz | Living |
| Cocama-Cocamilla | cod | Living |
| Cochimi | coj | Extinct |
| Cocopa | coc | Living |
| Cocos Islands Malay | coa | Living |
| Coeur d'Alene | crd | Living |
| Cofán | con | Living |
| Cogui | kog | Living |
| Col | liw | Living |
| Colombian Sign Language | csn | Living |
| Colonia Tovar German | gct | Living |
| Colorado | cof | Living |
| Columbia-Wenatchi | col | Living |
| Comaltepec Chinantec | cco | Living |
| Comanche | com | Living |
| Comecrudo | xcm | Extinct |
| Como Karim | cfg | Living |
| Comox | coo | Living |
| Con | cno | Living |
| Congo Swahili | swc | Living |
| Côông | cnc | Living |
| Coos | csz | Living |
| Copainalá Zoque | zoc | Living |
| Copala Triqui | trc | Living |
| Coptic | cop | Extinct |
| Coquille | coq | Extinct |
| Cori | cry | Living |
| Cornish | cor | Living |
| Corongo Ancash Quechua | qwa | Living |
| Corsican | cos | Living |
| Costa Rican Sign Language | csr | Living |
| Cotabato Manobo | mta | Living |
| Cotoname | xcn | Extinct |
| Cowlitz | cow | Extinct |
| Coxima | kox | Extinct |
| Coyaima | coy | Extinct |
| Coyotepec Popoloca | pbf | Living |
| Coyutla Totonac | toc | Living |
| Cree | cre | Living |
| Creek | mus | Living |
| Crimean Tatar | crh | Living |
| Croatia Sign Language | csq | Living |
| Croatian | hrv | Living |
| Cross River Mbembe | mfn | Living |
| Crow | cro | Living |
| Cruzeño | crz | Extinct |
| Cua | cua | Living |
| Cuba Sign Language | csf | Living |
| Cubeo | cub | Living |
| Cuiba | cui | Living |
| Culina | cul | Living |
| Cumanagoto | cuo | Extinct |
| Cumbric | xcb | Extinct |
| Cumeral | cum | Extinct |
| Cun | cuq | Living |
| Cuneiform Luwian | xlu | Ancient |
| Cung | cug | Living |
| Cupeño | cup | Extinct |
| Curonian | xcu | Extinct |
| Curripaco | kpc | Living |
| Cusco Quechua | quz | Living |
| Cutchi-Swahili | ccl | Living |
| Cuvok | cuv | Living |
| Cuyamecalco Mixtec | xtu | Living |
| Cuyonon | cyo | Living |
| Cwi Bwamu | bwy | Living |
| Cypriot Arabic | acy | Living |
| Czech | ces | Living |
| Czech Sign Language | cse | Living |
| Da'a Kaili | kzf | Living |
| Daai Chin | dao | Living |
| Daakaka | bpa | Living |
| Daantanai' | lni | Living |
| Daasanach | dsh | Living |
| Daba | dbq | Living |
| Dabarre | dbr | Living |
| Dabe | dbe | Living |
| Dacian | xdc | Ancient |
| Dadi Dadi | dda | Extinct |
| Dadibi | mps | Living |
| Dadiya | dbd | Living |
| Daga | dgz | Living |
| Dagaari Dioula | dgd | Living |
| Dagba | dgk | Living |
| Dagbani | dag | Living |
| Dagik | dec | Living |
| Dagoman | dgn | Extinct |
| Dahalik | dlk | Living |
| Dahalo | dal | Living |
| Daho-Doo | das | Living |
| Dai | dij | Living |
| Dai Zhuang | zhd | Living |
| Dair | drb | Living |
| Dakka | dkk | Living |
| Dakota | dak | Living |
| Dakpakha | dka | Living |
| Dalabon | ngk | Living |
| Dalmatian | dlm | Extinct |
| Daloa Bété | bev | Living |
| Dama | dmm | Living |
| Damakawa | dam | Living |
| Damal | uhn | Living |
| Dambi | dac | Living |
| Dameli | dml | Living |
| Dampelas | dms | Living |
| Dan | dnj | Living |
| Danaru | dnr | Living |
| Danau | dnu | Living |
| Dandami Maria | daq | Living |
| Dangaléat | daa | Living |
| Dangaura Tharu | thl | Living |
| Danish | dan | Living |
| Danish Sign Language | dsl | Living |
| Dano | aso | Living |
| Danu | dnv | Living |
| Dao | daz | Living |
| Daonda | dnd | Living |
| Dar Daju Daju | djc | Living |
| Dar Fur Daju | daj | Living |
| Dar Sila Daju | dau | Living |
| Darai | dry | Living |
| Dargwa | dar | Living |
| Dari | prs | Living |
| Darkinyung | xda | Living |
| Darlong | dln | Living |
| Darmiya | drd | Living |
| Daro-Matu Melanau | dro | Living |
| Dass | dot | Living |
| Datooga | tcc | Living |
| Daungwurrung | dgw | Extinct |
| Daur | dta | Living |
| Davawenyo | daw | Living |
| Dâw | kwa | Living |
| Dawawa | dww | Living |
| Dawera-Daweloor | ddw | Living |
| Dawro | dwr | Living |
| Day | dai | Living |
| Dayi | dax | Living |
| Dazaga | dzg | Living |
| Deccan | dcc | Living |
| Dedua | ded | Living |
| Defaka | afn | Living |
| Defi Gbe | gbh | Living |
| Deg | mzw | Living |
| Degaru | dgu | Living |
| Degema | deg | Living |
| Degenan | dge | Living |
| Degexit'an | ing | Living |
| Dehu | dhv | Living |
| Dehwari | deh | Living |
| Dek | dek | Living |
| Dela-Oenale | row | Living |
| Delaware | del | Living |
| Delo | ntr | Living |
| Dem | dem | Living |
| Dema | dmx | Living |
| Demisa | dei | Living |
| Demta | dmy | Living |
| Dendi (Benin) | ddn | Living |
| Dendi (Central African Republic) | deq | Living |
| Dengese | dez | Living |
| Dengka | dnk | Living |
| Dení | dny | Living |
| Deno | dbb | Living |
| Denya | anv | Living |
| Deori | der | Living |
| Dera (Indonesia) | kbv | Living |
| Dera (Nigeria) | kna | Living |
| Desano | des | Living |
| Desiya | dso | Living |
| Dewoin | dee | Living |
| Dezfuli | def | Living |
| Dghwede | dgh | Living |
| Dhaiso | dhs | Living |
| Dhalandji | dhl | Living |
| Dhangu | dhg | Living |
| Dhanki | dhn | Living |
| Dhanwar (Nepal) | dhw | Living |
| Dhao | nfa | Living |
| Dhargari | dhr | Living |
| Dharuk | xdk | Extinct |
| Dharumbal | xgm | Extinct |
| Dhatki | mki | Living |
| Dhimal | dhi | Living |
| Dhivehi | div | Living |
| Dhodia | dho | Living |
| Dhofari Arabic | adf | Living |
| Dhudhuroa | ddr | Extinct |
| Dhundari | dhd | Living |
| Dhungaloo | dhx | Living |
| Dhurga | dhu | Extinct |
| Dhuwal | duj | Living |
| Dia | dia | Living |
| Dibabawon Manobo | mbd | Living |
| Dibiyaso | dby | Living |
| Dibo | dio | Living |
| Dibole | bvx | Living |
| Dicamay Agta | duy | Extinct |
| Didinga | did | Living |
| Dido | ddo | Living |
| Dieri | dif | Extinct |
| Digaro-Mishmi | mhu | Living |
| Digo | dig | Living |
| Dii | dur | Living |
| Dijim-Bwilim | cfa | Living |
| Dilling | dil | Living |
| Dima | jma | Living |
| Dimasa | dis | Living |
| Dimbong | dii | Living |
| Dime | dim | Living |
| Dimli (individual language) | diq | Living |
| Ding | diz | Living |
| Dinka | din | Living |
| Dirari | dit | Extinct |
| Dirasha | gdl | Living |
| Diri | dwa | Living |
| Diriku | diu | Living |
| Dirim | dir | Living |
| Disa | dsi | Living |
| Ditammari | tbz | Living |
| Ditidaht | dtd | Living |
| Diuwe | diy | Living |
| Diuxi-Tilantongo Mixtec | xtd | Living |
| Dixon Reef | dix | Living |
| Dizin | mdx | Living |
| Djabwurrung | tjw | Living |
| Djadjawurrung | dja | Extinct |
| Djambarrpuyngu | djr | Living |
| Djamindjung | djd | Living |
| Djangun | djf | Extinct |
| Djauan | djn | Living |
| Djawi | djw | Extinct |
| Djeebbana | djj | Living |
| Djimini Senoufo | dyi | Living |
| Djinang | dji | Living |
| Djinba | djb | Living |
| Djingili | jig | Living |
| Djiwarli | dze | Extinct |
| Dobel | kvo | Living |
| Dobu | dob | Living |
| Doe | doe | Living |
| Doga | dgg | Living |
| Doghoro | dgx | Living |
| Dogosé | dos | Living |
| Dogoso | dgs | Living |
| Dogri (individual language) | dgo | Living |
| Dogri (macrolanguage) | doi | Living |
| Dogrib | dgr | Living |
| Dogul Dom Dogon | dbg | Living |
| Doka | dbi | Living |
| Doko-Uyanga | uya | Living |
| Dolgan | dlg | Living |
| Dolpo | dre | Living |
| Dom | doa | Living |
| Domaaki | dmk | Living |
| Domari | rmt | Living |
| Dombe | dov | Living |
| Dominican Sign Language | doq | Living |
| Dompo | doy | Living |
| Domu | dof | Living |
| Domung | dev | Living |
| Dondo | dok | Living |
| Dong | doh | Living |
| Dongo | doo | Living |
| Dongotono | ddd | Living |
| Dongshanba Lalo | yik | Living |
| Dongxiang | sce | Living |
| Donno So Dogon | dds | Living |
| Doondo | dde | Living |
| Dori'o | dor | Living |
| Doromu-Koki | kqc | Living |
| Dororo | drr | Extinct |
| Dorze | doz | Living |
| Doso | dol | Living |
| Dotyali | dty | Living |
| Doutai | tds | Living |
| Doyayo | dow | Living |
| Drents | drt | Living |
| Drung | duu | Living |
| Du~ya | ldb | Living |
| Duala | dua | Living |
| Duano | dup | Living |
| Duau | dva | Living |
| Dubli | dub | Living |
| Dubu | dmu | Living |
| Dugun | ndu | Living |
| Duguri | dbm | Living |
| Dugwor | dme | Living |
| Duhwa | kbz | Living |
| Duke | nke | Living |
| Dulbu | dbo | Living |
| Duli | duz | Extinct |
| Duma | dma | Living |
| Dumbea | duf | Living |
| Dumi | dus | Living |
| Dumpas | dmv | Living |
| Dumun | dui | Living |
| Duna | duc | Living |
| Dungan | dng | Living |
| Dungmali | raa | Living |
| Dungra Bhil | duh | Living |
| Dungu | dbv | Living |
| Dupaninan Agta | duo | Living |
| Dura | drq | Extinct |
| Duri | mvp | Living |
| Duriankere | dbn | Living |
| Duruma | dug | Living |
| Duruwa | pci | Living |
| Dusner | dsn | Living |
| Dusun Deyah | dun | Living |
| Dusun Malang | duq | Living |
| Dusun Witu | duw | Living |
| Dutch | nld | Living |
| Dutch Sign Language | dse | Living |
| Dutton World Speedwords | dws | Constructed |
| Duungooma | dux | Living |
| Duupa | dae | Living |
| Duvle | duv | Living |
| Duwai | dbp | Living |
| Duwet | gve | Living |
| Dwang | nnu | Living |
| Dyaabugay | dyy | Living |
| Dyaberdyaber | dyb | Extinct |
| Dyan | dya | Living |
| Dyangadi | dyn | Living |
| Dyirbal | dbl | Living |
| Dyugun | dyd | Extinct |
| Dyula | dyu | Living |
| Dza | jen | Living |
| Dzalakha | dzl | Living |
| Dzando | dzn | Living |
| Dzao Min | bpn | Living |
| Dzodinka | add | Living |
| Dzongkha | dzo | Living |
| Dzùùngoo | dnn | Living |
| E | eee | Living |
| Early Tripuri | xtr | Ancient |
| East Ambae | omb | Living |
| East Berawan | zbe | Living |
| East Damar | dmr | Living |
| East Futuna | fud | Living |
| East Kewa | kjs | Living |
| East Limba | lma | Living |
| East Makian | mky | Living |
| East Masela | vme | Living |
| East Nyala | nle | Living |
| East Tarangan | tre | Living |
| East Yugur | yuy | Living |
| Eastern Abnaki | aaq | Extinct |
| Eastern Acipa | acp | Living |
| Eastern Apurímac Quechua | qve | Living |
| Eastern Arrernte | aer | Living |
| Eastern Balochi | bgp | Living |
| Eastern Bolivian Guaraní | gui | Living |
| Eastern Bontok | ebk | Living |
| Eastern Bru | bru | Living |
| Eastern Canadian Inuktitut | ike | Living |
| Eastern Cham | cjm | Living |
| Eastern Durango Nahuatl | azd | Living |
| Eastern Egyptian Bedawi Arabic | avl | Living |
| Eastern Frisian | frs | Living |
| Eastern Gorkha Tamang | tge | Living |
| Eastern Gurung | ggn | Living |
| Eastern Highland Chatino | cly | Living |
| Eastern Highland Otomi | otm | Living |
| Eastern Hongshuihe Zhuang | zeh | Living |
| Eastern Huasteca Nahuatl | nhe | Living |
| Eastern Huishui Hmong | hme | Living |
| Eastern Karaboro | xrb | Living |
| Eastern Karnic | ekc | Extinct |
| Eastern Katu | ktv | Living |
| Eastern Kayah | eky | Living |
| Eastern Keres | kee | Living |
| Eastern Khumi Chin | cek | Living |
| Eastern Krahn | kqo | Living |
| Eastern Lalu | yit | Living |
| Eastern Lawa | lwl | Living |
| Eastern Magar | mgp | Living |
| Eastern Maninkakan | emk | Living |
| Eastern Mari | mhr | Living |
| Eastern Maroon Creole | djk | Living |
| Eastern Meohang | emg | Living |
| Eastern Mnong | mng | Living |
| Eastern Muria | emu | Living |
| Eastern Ngad'a | nea | Living |
| Eastern Nisu | nos | Living |
| Eastern Ojibwa | ojg | Living |
| Eastern Oromo | hae | Living |
| Eastern Parbate Kham | kif | Living |
| Eastern Penan | pez | Living |
| Eastern Pomo | peb | Extinct |
| Eastern Qiandong Miao | hmq | Living |
| Eastern Subanen | sfe | Living |
| Eastern Tamang | taj | Living |
| Eastern Tawbuid | bnj | Living |
| Eastern Xiangxi Miao | muq | Living |
| Eastern Xwla Gbe | gbx | Living |
| Eastern Yiddish | ydd | Living |
| Ebira | igb | Living |
| Eblan | xeb | Ancient |
| Ebrié | ebr | Living |
| Ebughu | ebg | Living |
| Ecuadorian Sign Language | ecs | Living |
| Ede Cabe | cbj | Living |
| Ede Ica | ica | Living |
| Ede Idaca | idd | Living |
| Ede Ije | ijj | Living |
| Edera Awyu | awy | Living |
| Edolo | etr | Living |
| Edomite | xdm | Ancient |
| Edopi | dbf | Living |
| Efai | efa | Living |
| Efe | efe | Living |
| Efik | efi | Living |
| Efutop | ofu | Living |
| Ega | ega | Living |
| Eggon | ego | Living |
| Egypt Sign Language | esl | Living |
| Egyptian (Ancient) | egy | Ancient |
| Egyptian Arabic | arz | Living |
| Ehueun | ehu | Living |
| Eipomek | eip | Living |
| Eitiep | eit | Living |
| Ejagham | etu | Living |
| Ejamat | eja | Living |
| Ekajuk | eka | Living |
| Ekari | ekg | Living |
| Eki | eki | Living |
| Ekit | eke | Living |
| Ekpeye | ekp | Living |
| El Alto Zapotec | zpp | Living |
| El Hugeirat | elh | Living |
| El Molo | elo | Living |
| El Nayar Cora | crn | Living |
| Elamite | elx | Ancient |
| Eleme | elm | Living |
| Elepi | ele | Living |
| Elip | ekm | Living |
| Elkei | elk | Living |
| Elotepec Zapotec | zte | Living |
| Eloyi | afo | Living |
| Elseng | mrf | Living |
| Elu | elu | Living |
| Elymian | xly | Ancient |
| E'ma Buyang | yzg | Living |
| Emae | mmw | Living |
| Emai-Iuleha-Ora | ema | Living |
| Eman | emn | Living |
| Embaloh | emb | Living |
| Emberá-Baudó | bdc | Living |
| Emberá-Catío | cto | Living |
| Emberá-Chamí | cmi | Living |
| Emberá-Tadó | tdc | Living |
| Embu | ebu | Living |
| Emerillon | eme | Living |
| Emilian | egl | Living |
| Emplawas | emw | Living |
| Emumu | enr | Living |
| En | enc | Living |
| E'ñapa Woromaipu | pbh | Living |
| Enawené-Nawé | unk | Living |
| Ende | end | Living |
| Enga | enq | Living |
| Engdewu | ngr | Living |
| Engenni | enn | Living |
| Enggano | eno | Living |
| English | eng | Living |
| Enlhet | enl | Living |
| Enrekang | ptt | Living |
| Enu | enu | Living |
| Enwan (Akwa Ibom State) | enw | Living |
| Enwan (Edu State) | env | Living |
| Enxet | enx | Living |
| Enya | gey | Living |
| Epena | sja | Living |
| Epie | epi | Living |
| Epigraphic Mayan | emy | Extinct |
| Epi-Olmec | xep | Ancient |
| Eravallan | era | Living |
| Erave | kjy | Living |
| Ere | twp | Living |
| Eritai | ert | Living |
| Erokwanas | erw | Living |
| Erre | err | Extinct |
| Erromintxela | emx | Living |
| Ersu | ers | Living |
| Eruwa | erh | Living |
| Erzya | myv | Living |
| Esan | ish | Living |
| Ese | mcq | Living |
| Ese Ejja | ese | Living |
| Eshtehardi | esh | Living |
| Esimbi | ags | Living |
| Eskayan | esy | Living |
| Esperanto | epo | Constructed |
| Esselen | esq | Extinct |
| Estado de México Otomi | ots | Living |
| Estonian | est | Living |
| Estonian Sign Language | eso | Living |
| Esuma | esm | Extinct |
| Etchemin | etc | Extinct |
| Etebi | etb | Living |
| Eten | etx | Living |
| Eteocretan | ecr | Ancient |
| Eteocypriot | ecy | Ancient |
| Ethiopian Sign Language | eth | Living |
| Etkywan | ich | Living |
| Eton (Cameroon) | eto | Living |
| Eton (Vanuatu) | etn | Living |
| Etruscan | ett | Ancient |
| Etulo | utr | Living |
| Evant | bzz | Living |
| Even | eve | Living |
| Evenki | evn | Living |
| Eviya | gev | Living |
| Ewage-Notu | nou | Living |
| Ewe | ewe | Living |
| Ewondo | ewo | Living |
| Extremaduran | ext | Living |
| Eyak | eya | Extinct |
| Ezaa | eza | Living |
| Fa D'ambu | fab | Living |
| Fagani | faf | Living |
| Faire Atta | azt | Living |
| Faita | faj | Living |
| Faiwol | fai | Living |
| Fala | fax | Living |
| Falam Chin | cfm | Living |
| Fali | fli | Living |
| Faliscan | xfa | Ancient |
| Fam | fam | Living |
| Fanagalo | fng | Living |
| Fanamaket | bjp | Living |
| Fang (Cameroon) | fak | Living |
| Fang (Equatorial Guinea) | fan | Living |
| Fania | fni | Living |
| Fanti | fat | Living |
| Far Western Muria | fmu | Living |
| Farefare | gur | Living |
| Faroese | fao | Living |
| Fas | fqs | Living |
| Fasu | faa | Living |
| Fataleka | far | Living |
| Fataluku | ddg | Living |
| Fayu | fau | Living |
| Fe'fe' | fmp | Living |
| Fembe | agl | Living |
| Fernando Po Creole English | fpe | Living |
| Feroge | fer | Living |
| Fiji Hindi | hif | Living |
| Fijian | fij | Living |
| Filipino | fil | Living |
| Filomena Mata-Coahuitlán Totonac | tlp | Living |
| Finland-Swedish Sign Language | fss | Living |
| Finnish | fin | Living |
| Finnish Sign Language | fse | Living |
| Finongan | fag | Living |
| Fipa | fip | Living |
| Firan | fir | Living |
| Fiwaga | fiw | Living |
| Flaaitaal | fly | Living |
| Flinders Island | fln | Extinct |
| Foau | flh | Living |
| Foi | foi | Living |
| Foia Foia | ffi | Living |
| Folopa | ppo | Living |
| Foma | fom | Living |
| Fon | fon | Living |
| Fongoro | fgr | Living |
| Foodo | fod | Living |
| Forak | frq | Living |
| Fordata | frd | Living |
| Fore | for | Living |
| Forest Enets | enf | Living |
| Fortsenal | frt | Living |
| Francisco León Zoque | zos | Living |
| Frankish | frk | Extinct |
| French | fra | Living |
| French Sign Language | fsl | Living |
| Friulian | fur | Living |
| Fulah | ful | Living |
| Fuliiru | flr | Living |
| Fulniô | fun | Living |
| Fum | fum | Living |
| Fungwa | ula | Living |
| Fur | fvr | Living |
| Furu | fuu | Living |
| Futuna-Aniwa | fut | Living |
| Fuyug | fuy | Living |
| Fwâi | fwa | Living |
| Fwe | fwe | Living |
| Fyam | pym | Living |
| Fyer | fie | Living |
| Gǀui | gwj | Living |
| Gǁana | gnk | Living |
| Ga | gaa | Living |
| Gaa | ttb | Living |
| Gaam | tbi | Living |
| Ga'anda | gqa | Living |
| Gabi-Gabi | gbw | Living |
| Gabri | gab | Living |
| Gabrielino-Fernandeño | xgf | Extinct |
| Gadang | gdk | Living |
| Ga'dang | gdg | Living |
| Gaddang | gad | Living |
| Gaddi | gbk | Living |
| Gade | ged | Living |
| Gade Lohar | gda | Living |
| Gadjerawang | gdh | Living |
| Gadsup | gaj | Living |
| Gafat | gft | Extinct |
| Gagadu | gbu | Living |
| Gagauz | gag | Living |
| Gagnoa Bété | btg | Living |
| Gagu | ggu | Living |
| Gahri | bfu | Living |
| Gaikundi | gbf | Living |
| Gail | gic | Living |
| Gaina | gcn | Living |
| Gal | gap | Living |
| Galambu | glo | Living |
| Galatian | xga | Ancient |
| Galela | gbi | Living |
| Galeya | gar | Living |
| Galibi Carib | car | Living |
| Galice | gce | Extinct |
| Galician | glg | Living |
| Galindan | xgl | Extinct |
| Gallurese Sardinian | sdn | Living |
| Galo | adl | Living |
| Galolen | gal | Living |
| Gamale Kham | kgj | Living |
| Gambera | gma | Extinct |
| Gambian Wolof | wof | Living |
| Gamilaraay | kld | Living |
| Gamit | gbl | Living |
| Gamkonora | gak | Living |
| Gamo | gmv | Living |
| Gamo-Ningi | bte | Extinct |
| Gan Chinese | gan | Living |
| Gana | gnq | Living |
| Ganang | gne | Living |
| Ganda | lug | Living |
| Gandhari | pgd | Historic |
| Gane | gzn | Living |
| Ganggalida | gcd | Extinct |
| Ganglau | ggl | Living |
| Gangte | gnb | Living |
| Gangulu | gnl | Extinct |
| Gants | gao | Living |
| Ganza | gza | Living |
| Ganzi | gnz | Living |
| Gao | gga | Living |
| Gapapaiwa | pwg | Living |
| Garhwali | gbm | Living |
| Garifuna | cab | Living |
| Garig-Ilgar | ilg | Extinct |
| Garingbal | xgi | Extinct |
| Garlali | gll | Extinct |
| Garo | grt | Living |
| Garre | gex | Living |
| Garrwa | wrk | Living |
| Garus | gyb | Living |
| Garza | xgr | Extinct |
| Gata' | gaq | Living |
| Gavak | dmc | Living |
| Gavar | gou | Living |
| Gavião Do Jiparaná | gvo | Living |
| Gawar-Bati | gwt | Living |
| Gawwada | gwd | Living |
| Gayil | gyl | Living |
| Gayo | gay | Living |
| Gazi | gzi | Living |
| Gbagyi | gbr | Living |
| Gbanu | gbv | Living |
| Gbanziri | gbg | Living |
| Gbari | gby | Living |
| Gbaya (Central African Republic) | gba | Living |
| Gbaya (Sudan) | krs | Living |
| Gbaya-Bossangoa | gbp | Living |
| Gbaya-Bozoum | gbq | Living |
| Gbaya-Mbodomo | gmm | Living |
| Gbayi | gyg | Living |
| Gbesi Gbe | gbs | Living |
| Gbii | ggb | Living |
| Gbin | xgb | Extinct |
| Gbiri-Niragu | grh | Living |
| Gboloo Grebo | gec | Living |
| Ge | hmj | Living |
| Geba Karen | kvq | Living |
| Gebe | gei | Living |
| Gedaged | gdd | Living |
| Gedeo | drs | Living |
| Geez | gez | Ancient |
| Geji | gji | Living |
| Geko Karen | ghk | Living |
| Gela | nlg | Living |
| Geme | geq | Living |
| Gen | gej | Living |
| Gende | gaf | Living |
| Gengle | geg | Living |
| Georgian | kat | Living |
| Gepo | ygp | Living |
| Gera | gew | Living |
| German | deu | Living |
| German Sign Language | gsg | Living |
| Geruma | gea | Living |
| Geser-Gorom | ges | Living |
| Gey | guv | Extinct |
| Ghadamès | gha | Living |
| Ghanaian Pidgin English | gpe | Living |
| Ghanaian Sign Language | gse | Living |
| Ghandruk Sign Language | gds | Living |
| Ghanongga | ghn | Living |
| Ghari | gri | Living |
| Ghayavi | bmk | Living |
| Gheg Albanian | aln | Living |
| Ghera | ghr | Living |
| Ghodoberi | gdo | Living |
| Ghomálá' | bbj | Living |
| Ghomara | gho | Extinct |
| Ghotuo | aaa | Living |
| Ghulfan | ghl | Living |
| Giangan | bgi | Living |
| Gibanawa | gib | Living |
| Gidar | gid | Living |
| Giiwo | kks | Living |
| Gikyode | acd | Living |
| Gilaki | glk | Living |
| Gilbertese | gil | Living |
| Gilima | gix | Living |
| Gilyak | niv | Living |
| Gimi (Eastern Highlands) | gim | Living |
| Gimi (West New Britain) | gip | Living |
| Gimme | kmp | Living |
| Gimnime | gmn | Living |
| Ginuman | gnm | Living |
| Ginyanga | ayg | Living |
| Girawa | bbr | Living |
| Giryama | nyf | Living |
| Githabul | gih | Living |
| Gitonga | toh | Living |
| Gitua | ggt | Living |
| Gitxsan | git | Living |
| Giyug | giy | Living |
| Gizrra | tof | Living |
| Glaro-Twabo | glr | Living |
| Glavda | glw | Living |
| Glio-Oubi | oub | Living |
| Gnau | gnu | Living |
| Goan Konkani | gom | Living |
| Goaria | gig | Living |
| Gobasi | goi | Living |
| Gobu | gox | Living |
| Godié | god | Living |
| Godwari | gdx | Living |
| Goemai | ank | Living |
| Gofa | gof | Living |
| Gogo | gog | Living |
| Gogodala | ggw | Living |
| Gokana | gkn | Living |
| Gola | gol | Living |
| Golin | gvf | Living |
| Golpa | lja | Extinct |
| Gondi | gon | Living |
| Gone Dau | goo | Living |
| Gongduk | goe | Living |
| Gonja | gjn | Living |
| Gooniyandi | gni | Living |
| Gor | gqr | Living |
| Gorakor | goc | Living |
| Gorap | goq | Living |
| Goreng | xgg | Extinct |
| Gorontalo | gor | Living |
| Gorovu | grq | Living |
| Gorowa | gow | Living |
| Gothic | got | Ancient |
| Goundo | goy | Living |
| Gourmanchéma | gux | Living |
| Gowlan | goj | Living |
| Gowli | gok | Living |
| Gowro | gwf | Living |
| Gozarkhani | goz | Living |
| Grangali | nli | Living |
| Grass Koiari | kbk | Living |
| Grebo | grb | Living |
| Greek Sign Language | gss | Living |
| Green Gelao | giq | Living |
| Grenadian Creole English | gcl | Living |
| Gresi | grs | Living |
| Groma | gro | Living |
| Gronings | gos | Living |
| Gros Ventre | ats | Living |
| Gua | gwx | Living |
| Guadeloupean Creole French | gcf | Living |
| Guahibo | guh | Living |
| Guajá | gvj | Living |
| Guajajára | gub | Living |
| Guambiano | gum | Living |
| Guana (Brazil) | gqn | Extinct |
| Guana (Paraguay) | gva | Living |
| Guanano | gvc | Living |
| Guanche | gnc | Extinct |
| Guanyinqiao | jiq | Living |
| Guarani | grn | Living |
| Guarayu | gyr | Living |
| Guarequena | gae | Living |
| Guatemalan Sign Language | gsm | Living |
| Guató | gta | Living |
| Guayabero | guo | Living |
| Gudang | xgd | Extinct |
| Gudanji | nji | Living |
| Gude | gde | Living |
| Gudu | gdu | Living |
| Guduf-Gava | gdf | Living |
| Guerrero Amuzgo | amu | Living |
| Guerrero Nahuatl | ngu | Living |
| Guevea De Humboldt Zapotec | zpg | Living |
| Gugadj | ggd | Extinct |
| Gugu Badhun | gdc | Extinct |
| Gugu Warra | wrw | Extinct |
| Gugubera | kkp | Living |
| Guguyimidjir | kky | Living |
| Guhu-Samane | ghs | Living |
| Guianese Creole French | gcr | Living |
| Guibei Zhuang | zgb | Living |
| Guiberoua Béte | bet | Living |
| Guibian Zhuang | zgn | Living |
| Güilá Zapotec | ztu | Living |
| Guinea Kpelle | gkp | Living |
| Guinean Sign Language | gus | Living |
| Guiqiong | gqi | Living |
| Gujarati | guj | Living |
| Gujari | gju | Living |
| Gula (Central African Republic) | kcm | Living |
| Gula (Chad) | glu | Living |
| Gula Iro | glj | Living |
| Gula'alaa | gmb | Living |
| Gulay | gvl | Living |
| Gule | gly | Extinct |
| Gulf Arabic | afb | Living |
| Guliguli | gli | Extinct |
| Gumalu | gmu | Living |
| Gumatj | gnn | Living |
| Gumawana | gvs | Living |
| Gumuz | guk | Living |
| Gun | guw | Living |
| Gundi | gdi | Living |
| Gunditjmara | gjm | Extinct |
| Gundungurra | xrd | Extinct |
| Gungabula | gyf | Extinct |
| Gungu | rub | Living |
| Guntai | gnt | Living |
| Gunwinggu | gup | Living |
| Gunya | gyy | Extinct |
| Gupa-Abawa | gpa | Living |
| Gupapuyngu | guf | Living |
| Guragone | gge | Living |
| Guramalum | grz | Living |
| Gurani | hac | Living |
| Gurdjar | gdj | Living |
| Gureng Gureng | gnr | Extinct |
| Gurgula | ggg | Living |
| Guriaso | grx | Living |
| Gurinji | gue | Living |
| Gurmana | gvm | Living |
| Guro | goa | Living |
| Guruntum-Mbaaru | grd | Living |
| Gusan | gsn | Living |
| Gusii | guz | Living |
| Gusilay | gsl | Living |
| Guwa | xgw | Extinct |
| Guwamu | gwu | Extinct |
| Guya | gka | Living |
| Guyanese Creole English | gyn | Living |
| Guyani | gvy | Extinct |
| Gvoko | ngs | Living |
| Gwa | gwb | Living |
| Gwahatike | dah | Living |
| Gwak | jgk | Living |
| Gwamhi-Wuri | bga | Living |
| Gwandara | gwn | Living |
| Gweda | grw | Living |
| Gweno | gwe | Living |
| Gwere | gwr | Living |
| Gwich'in | gwi | Living |
| Gyele | gyi | Living |
| Gyem | gye | Living |
| Ha | haq | Living |
| Habu | hbu | Living |
| Hadiyya | hdy | Living |
| Hadothi | hoj | Living |
| Hadrami | xhd | Ancient |
| Hadrami Arabic | ayh | Living |
| Hadza | hts | Living |
| Haeke | aek | Living |
| Hahon | hah | Living |
| Hai//om | hgm | Living |
| Haida | hai | Living |
| Haigwai | hgw | Living |
| Haiphong Sign Language | haf | Living |
| Haisla | has | Living |
| Haitian | hat | Living |
| Haitian Vodoun Culture Language | hvc | Living |
| Haji | hji | Living |
| Hajong | haj | Living |
| Haka Chin | cnh | Living |
| Hakka Chinese | hak | Living |
| Hakö | hao | Living |
| Halang | hal | Living |
| Halang Doan | hld | Living |
| Halbi | hlb | Living |
| Halh Mongolian | khk | Living |
| Halia | hla | Living |
| Halkomelem | hur | Living |
| Hamap | hmu | Living |
| Hamba | hba | Living |
| Hamer-Banna | amf | Living |
| Hamtai | hmt | Living |
| Han | haa | Living |
| Hanga | hag | Living |
| Hanga Hundi | wos | Living |
| Hangaza | han | Living |
| Hani | hni | Living |
| Hano | lml | Living |
| Hanoi Sign Language | hab | Living |
| Hanunoo | hnn | Living |
| Harami | xha | Ancient |
| Harari | har | Living |
| Harijan Kinnauri | kjo | Living |
| Haroi | hro | Living |
| Harsusi | hss | Living |
| Haruai | tmd | Living |
| Haruku | hrk | Living |
| Haryanvi | bgc | Living |
| Harzani | hrz | Living |
| Hasha | ybj | Living |
| Hassaniyya | mey | Living |
| Hatam | had | Living |
| Hattic | xht | Ancient |
| Hausa | hau | Living |
| Hausa Sign Language | hsl | Living |
| Havasupai-Walapai-Yavapai | yuf | Living |
| Haveke | hvk | Living |
| Havu | hav | Living |
| Hawai'i Creole English | hwc | Living |
| Hawai'i Sign Language (HSL) | hps | Living |
| Hawaiian | haw | Living |
| Haya | hay | Living |
| Hazaragi | haz | Living |
| Hdi | xed | Living |
| Hebrew | heb | Living |
| Hehe | heh | Living |
| Heiban | hbn | Living |
| Heiltsuk | hei | Living |
| Helambu Sherpa | scp | Living |
| Helong | heg | Living |
| Hema | nix | Living |
| Hemba | hem | Living |
| Herdé | hed | Living |
| Herero | her | Living |
| Hermit | llf | Extinct |
| Hernican | xhr | Ancient |
| Hértevin | hrt | Living |
| Hewa | ham | Living |
| Heyo | auk | Living |
| Hiberno-Scottish Gaelic | ghc | Extinct |
| Hibito | hib | Extinct |
| Hidatsa | hid | Living |
| Hieroglyphic Luwian | hlu | Ancient |
| Higaonon | mba | Living |
| Highland Konjo | kjk | Living |
| Highland Oaxaca Chontal | chd | Living |
| Highland Popoluca | poi | Living |
| Highland Puebla Nahuatl | azz | Living |
| Highland Totonac | tos | Living |
| Hijazi Arabic | acw | Living |
| Hijuk | hij | Living |
| Hiligaynon | hil | Living |
| Himarimã | hir | Living |
| Hindi | hin | Living |
| Hinduri | hii | Living |
| Hinukh | gin | Living |
| Hiri Motu | hmo | Living |
| Hittite | hit | Ancient |
| Hitu | htu | Living |
| Hiw | hiw | Living |
| Hixkaryána | hix | Living |
| Hlai | lic | Living |
| Hlepho Phowa | yhl | Living |
| Hlersu | hle | Living |
| Hmar | hmr | Living |
| Hmong | hmn | Living |
| Hmong Daw | mww | Living |
| Hmong Dô | hmv | Living |
| Hmong Don | hmf | Living |
| Hmong Njua | hnj | Living |
| Hmong Shua | hmz | Living |
| Hmwaveke | mrk | Living |
| Ho | hoc | Living |
| Ho Chi Minh City Sign Language | hos | Living |
| Hoava | hoa | Living |
| Hobyót | hoh | Living |
| Ho-Chunk | win | Living |
| Hoia Hoia | hhi | Living |
| Holikachuk | hoi | Living |
| Holiya | hoy | Living |
| Holma | hod | Extinct |
| Holoholo | hoo | Living |
| Holu | hol | Living |
| Homa | hom | Extinct |
| Honduras Sign Language | hds | Living |
| Hõne | juh | Living |
| Hong Kong Sign Language | hks | Living |
| Honi | how | Living |
| Hopi | hop | Living |
| Horned Miao | hrm | Living |
| Horo | hor | Extinct |
| Horom | hoe | Living |
| Horpa | ero | Living |
| Hote | hot | Living |
| Hoti | hti | Living |
| Hovongan | hov | Living |
| Hoyahoya | hhy | Living |
| Hozo | hoz | Living |
| Hpon | hpo | Living |
| Hrangkhol | hra | Living |
| Hre | hre | Living |
| Hruso | hru | Living |
| Hu | huo | Living |
| Huachipaeri | hug | Living |
| Huallaga Huánuco Quechua | qub | Living |
| Huamalíes-Dos de Mayo Huánuco Quechua | qvh | Living |
| Huambisa | hub | Living |
| Huarijio | var | Living |
| Huastec | hus | Living |
| Huaulu | hud | Living |
| Huautla Mazatec | mau | Living |
| Huaxcaleca Nahuatl | nhq | Living |
| Huaylas Ancash Quechua | qwh | Living |
| Huaylla Wanca Quechua | qvw | Living |
| Huba | hbb | Living |
| Huehuetla Tepehua | tee | Living |
| Huichol | hch | Living |
| Huilliche | huh | Living |
| Huitepec Mixtec | mxs | Living |
| Huizhou Chinese | czh | Living |
| Hukumina | huw | Extinct |
| Hula | hul | Living |
| Hulaulá | huy | Living |
| Huli | hui | Living |
| Hulung | huk | Living |
| Humburi Senni Songhay | hmb | Living |
| Humene | huf | Living |
| Humla | hut | Living |
| Hunde | hke | Living |
| Hung | hnu | Living |
| Hungana | hum | Living |
| Hungarian | hun | Living |
| Hungarian Sign Language | hsh | Living |
| Hunjara-Kaina Ke | hkk | Living |
| Hunnic | xhc | Extinct |
| Hun-Saare | dud | Living |
| Hunsrik | hrx | Living |
| Hunzib | huz | Living |
| Hupa | hup | Living |
| Hupdë | jup | Living |
| Hupla | hap | Living |
| Hurrian | xhu | Ancient |
| Hutterite German | geh | Living |
| Hwana | hwo | Living |
| Hya | hya | Living |
| Hyam | jab | Living |
| Iaai | iai | Living |
| Iamalele | yml | Living |
| Iapama | iap | Living |
| Iatmul | ian | Living |
| Iau | tmu | Living |
| Ibali Teke | tek | Living |
| Ibaloi | ibl | Living |
| Iban | iba | Living |
| Ibanag | ibg | Living |
| Ibani | iby | Living |
| Ibatan | ivb | Living |
| Iberian | xib | Ancient |
| Ibibio | ibb | Living |
| Ibino | ibn | Living |
| Ibu | ibu | Living |
| Ibuoro | ibr | Living |
| Icelandic | isl | Living |
| Icelandic Sign Language | icl | Living |
| Iceve-Maci | bec | Living |
| Ida'an | dbj | Living |
| Idakho-Isukha-Tiriki | ida | Living |
| Idaté | idt | Living |
| Idere | ide | Living |
| Idesa | ids | Living |
| Idi | idi | Living |
| Ido | ido | Constructed |
| Idoma | idu | Living |
| Idon | idc | Living |
| Idu-Mishmi | clk | Living |
| Iduna | viv | Living |
| Ifè | ife | Living |
| Ifo | iff | Extinct |
| Igala | igl | Living |
| Igana | igg | Living |
| Igbo | ibo | Living |
| Igede | ige | Living |
| Ignaciano | ign | Living |
| Igo | ahl | Living |
| Iguta | nar | Living |
| Igwe | igw | Living |
| Iha | ihp | Living |
| Iha Based Pidgin | ihb | Living |
| Ihievbe | ihi | Living |
| Ija-Zuba | vki | Living |
| Ik | ikx | Living |
| Ika | ikk | Living |
| Ikaranggal | ikr | Extinct |
| Ikizu | ikz | Living |
| Iko | iki | Living |
| Ikobi | meb | Living |
| Ikoma-Nata-Isenye | ntk | Living |
| Ikpeng | txi | Living |
| Ikpeshi | ikp | Living |
| Ikposo | kpo | Living |
| Iku-Gora-Ankwa | ikv | Living |
| Ikulu | ikl | Living |
| Ikwere | ikw | Living |
| Ikwo | iqw | Living |
| Ila | ilb | Living |
| Ile Ape | ila | Living |
| Ili Turki | ili | Living |
| Ilianen Manobo | mbi | Living |
| Ili'uun | ilu | Living |
| Illyrian | xil | Ancient |
| Iloko | ilo | Living |
| Ilongot | ilk | Living |
| Ilue | ilv | Living |
| Ilwana | mlk | Living |
| Imbabura Highland Quichua | qvi | Living |
| Imbongu | imo | Living |
| Imonda | imn | Living |
| Imroing | imr | Living |
| Inabaknon | abx | Living |
| Inapang | mzu | Living |
| Iñapari | inp | Living |
| Inari Sami | smn | Living |
| Indian Sign Language | ins | Living |
| Indonesian | ind | Living |
| Indonesian Bajau | bdl | Living |
| Indonesian Sign Language | inl | Living |
| Indo-Portuguese | idb | Living |
| Indri | idr | Living |
| Indus Kohistani | mvy | Living |
| Indus Valley Language | xiv | Ancient |
| Inebu One | oin | Living |
| Ineseño | inz | Extinct |
| Inga | inb | Living |
| Ingrian | izh | Living |
| Ingush | inh | Living |
| Inlaod Itneg | iti | Living |
| Inoke-Yate | ino | Living |
| Inonhan | loc | Living |
| Inor | ior | Living |
| Inpui Naga | nkf | Living |
| Interglossa | igs | Constructed |
| Interlingua (International Auxiliary Language Association) | ina | Constructed |
| Interlingue | ile | Constructed |
| International Sign | ils | Living |
| Intha | int | Living |
| Inuinnaqtun | ikt | Living |
| Inuit Sign Language | iks | Living |
| Inuktitut | iku | Living |
| Inupiaq | ipk | Living |
| Iowa-Oto | iow | Extinct |
| Ipalapa Amuzgo | azm | Living |
| Ipiko | ipo | Living |
| Ipili | ipi | Living |
| Ipulo | ass | Living |
| Iquito | iqu | Living |
| Ir | irr | Living |
| Iranian Persian | pes | Living |
| Irántxe | irn | Living |
| Iranun | ill | Living |
| Iraqw | irk | Living |
| Irarutu | irh | Living |
| Iraya | iry | Living |
| Iresim | ire | Living |
| Irigwe | iri | Living |
| Irish | gle | Living |
| Irish Sign Language | isg | Living |
| Irula | iru | Living |
| Isabi | isa | Living |
| Isanzu | isn | Living |
| Isarog Agta | agk | Living |
| Isconahua | isc | Living |
| Isebe | igo | Living |
| Isekiri | its | Living |
| Ishkashimi | isk | Living |
| Isinai | inn | Living |
| Isirawa | srl | Living |
| Island Carib | crb | Extinct |
| Islander Creole English | icr | Living |
| Isnag | isd | Living |
| Isoko | iso | Living |
| Israeli Sign Language | isr | Living |
| Isthmus Mixe | mir | Living |
| Isthmus Zapotec | zai | Living |
| Isthmus-Cosoleacaque Nahuatl | nhk | Living |
| Isthmus-Mecayapan Nahuatl | nhx | Living |
| Isthmus-Pajapan Nahuatl | nhp | Living |
| Istriot | ist | Living |
| Istro Romanian | ruo | Living |
| Isu (Fako Division) | szv | Living |
| Isu (Menchum Division) | isu | Living |
| Italian | ita | Living |
| Italian Sign Language | ise | Living |
| Itawit | itv | Living |
| Itelmen | itl | Living |
| Itene | ite | Extinct |
| Iteri | itr | Living |
| Itik | itx | Living |
| Ito | itw | Living |
| Itonama | ito | Living |
| Itu Mbon Uzo | itm | Living |
| Itundujia Mixtec | mce | Living |
| Itzá | itz | Living |
| Iu Mien | ium | Living |
| Ivatan | ivv | Living |
| Ivbie North-Okpela-Arhe | atg | Living |
| Iwaidja | ibd | Living |
| I-Wak | iwk | Living |
| Iwal | kbm | Living |
| Iwam | iwm | Living |
| Iwur | iwo | Living |
| Ixcatec | ixc | Living |
| Ixcatlán Mazatec | mzi | Living |
| Ixil | ixl | Living |
| Ixtayutla Mixtec | vmj | Living |
| Ixtenco Otomi | otz | Living |
| Iyayu | iya | Living |
| Iyive | uiv | Living |
| Iyo | nca | Living |
| Iyojwa'ja Chorote | crt | Living |
| Iyo'wujwa Chorote | crq | Living |
| Izere | izr | Living |
| Izii | izz | Living |
| Izon | ijc | Living |
| Izora | cbo | Living |
| Jabutí | jbt | Living |
| Jad | jda | Living |
| Jadgali | jdg | Living |
| Jah Hut | jah | Living |
| Jahanka | jad | Living |
| Jair Awyu | awv | Living |
| Jaitmatang | xjt | Extinct |
| Jakati | jat | Living |
| Jakun | jak | Living |
| Jalapa De Díaz Mazatec | maj | Living |
| Jalkunan | bxl | Living |
| Jamaican Country Sign Language | jcs | Living |
| Jamaican Creole English | jam | Living |
| Jamaican Sign Language | jls | Living |
| Jamamadí | jaa | Living |
| Jambi Malay | jax | Living |
| Jamiltepec Mixtec | mxt | Living |
| Jamsay Dogon | djm | Living |
| Jandai | jan | Extinct |
| Jandavra | jnd | Living |
| Jangkang | djo | Living |
| Jangshung | jna | Living |
| Janji | jni | Living |
| Japanese | jpn | Living |
| Japanese Sign Language | jsl | Living |
| Japrería | jru | Living |
| Jaqaru | jqr | Living |
| Jara | jaf | Living |
| Jarai | jra | Living |
| Jarawa (India) | anq | Living |
| Jaru | ddj | Living |
| Jauja Wanca Quechua | qxw | Living |
| Jaunsari | jns | Living |
| Javanese | jav | Living |
| Javindo | jvd | Extinct |
| Jawe | jaz | Living |
| Jaya | jyy | Living |
| Jebero | jeb | Living |
| Jeh | jeh | Living |
| Jehai | jhi | Living |
| Jejueo | jje | Living |
| Jemez | tow | Living |
| Jenaama Bozo | bze | Living |
| Jeng | jeg | Living |
| Jennu Kurumba | xuj | Living |
| Jere | jer | Living |
| Jeri Kuo | jek | Living |
| Jèrriais | nrf | Living |
| Jerung | jee | Living |
| Jewish Babylonian Aramaic (ca. 200-1200 CE) | tmr | Extinct |
| Jewish Palestinian Aramaic | jpa | Historic |
| Jhankot Sign Language | jhs | Living |
| Jiamao | jio | Living |
| Jiarong | jya | Living |
| Jiba | juo | Living |
| Jibu | jib | Living |
| Jicarilla Apache | apj | Living |
| Jiiddu | jii | Living |
| Jilbe | jie | Living |
| Jilim | jil | Living |
| Jimi (Cameroon) | jim | Living |
| Jimi (Nigeria) | jmi | Living |
| Jina | jia | Living |
| Jinyu Chinese | cjy | Living |
| Jiongnai Bunu | pnu | Living |
| Jirel | jul | Living |
| Jiru | jrr | Living |
| Jita | jit | Living |
| Jju | kaj | Living |
| Joba | job | Living |
| Jofotek-Bromnya | jbr | Living |
| Jogi | jog | Living |
| Jola-Fonyi | dyo | Living |
| Jola-Kasa | csk | Living |
| Jonkor Bourmataguil | jeu | Living |
| Jorá | jor | Extinct |
| Jordanian Sign Language | jos | Living |
| Jorto | jrt | Living |
| Jowulu | jow | Living |
| Ju | juu | Living |
| Ju/'hoan | ktz | Living |
| Juang | jun | Living |
| Judeo-Arabic | jrb | Living |
| Judeo-Berber | jbe | Living |
| Judeo-Georgian | jge | Living |
| Judeo-Iraqi Arabic | yhd | Living |
| Judeo-Italian | itk | Living |
| Judeo-Moroccan Arabic | aju | Living |
| Judeo-Persian | jpr | Living |
| Judeo-Tat | jdt | Living |
| Judeo-Tripolitanian Arabic | yud | Living |
| Judeo-Tunisian Arabic | ajt | Living |
| Judeo-Yemeni Arabic | jye | Living |
| Jukun Takum | jbu | Living |
| Júma | jua | Living |
| Jumjum | jum | Living |
| Jumla Sign Language | jus | Living |
| Jumli | jml | Living |
| Jungle Inga | inj | Living |
| Juquila Mixe | mxq | Living |
| Jur Modo | bex | Living |
| Juray | juy | Living |
| Jurchen | juc | Extinct |
| Jurúna | jur | Living |
| Jutish | jut | Living |
| Juwal | mwb | Living |
| Juxtlahuaca Mixtec | vmc | Living |
| Jwira-Pepesa | jwi | Living |
| Kaamba | xku | Living |
| Kaan | ldl | Living |
| Kaang Chin | ckn | Living |
| Kaansa | gna | Living |
| Kaba | ksp | Living |
| Kabalai | kvf | Living |
| Kabardian | kbd | Living |
| Kabatei | xkp | Living |
| Kabixí | xbx | Extinct |
| Kabiyè | kbp | Living |
| Kabola | klz | Living |
| Kabore One | onk | Living |
| Kabras | lkb | Living |
| Kaburi | uka | Living |
| Kabutra | kbu | Living |
| Kabuverdianu | kea | Living |
| Kabwa | cwa | Living |
| Kabwari | kcw | Living |
| Kabyle | kab | Living |
| Kachama-Ganjule | kcx | Living |
| Kachari | xac | Living |
| Kachchi | kfr | Living |
| Kachi Koli | gjk | Living |
| Kachin | kac | Living |
| Kacipo-Balesi | koe | Living |
| Kaco' | xkk | Living |
| Kadai | kzd | Living |
| Kadar | kej | Living |
| Kadaru | kdu | Living |
| Kadiwéu | kbc | Living |
| Kadu | zkd | Living |
| Kaduo | ktp | Living |
| Kafa | kbr | Living |
| Kafoa | kpu | Living |
| Kagan Kalagan | kll | Living |
| Kagate | syw | Living |
| Kagayanen | cgc | Living |
| Kagoma | kdm | Living |
| Kagoro | xkg | Living |
| Kagulu | kki | Living |
| Kahe | hka | Living |
| Kahua | agw | Living |
| Kaian | kct | Living |
| Kaibobo | kzb | Living |
| Kaidipang | kzp | Living |
| Kaiep | kbw | Living |
| Kaikadi | kep | Living |
| Kaikavian Literary Language | kjv | Historic |
| Kaike | kzq | Living |
| Kaiku | kkq | Living |
| Kaimbé | xai | Extinct |
| Kaimbulawa | zka | Living |
| Kaingang | kgp | Living |
| Kairak | ckr | Living |
| Kairiru | kxa | Living |
| Kairui-Midiki | krd | Living |
| Kais | kzm | Living |
| Kaivi | kce | Living |
| Kaiwá | kgk | Living |
| Kaiy | tcq | Living |
| Kajakse | ckq | Living |
| Kajali | xkj | Living |
| Kajaman | kag | Living |
| Kakabai | kqf | Living |
| Kakabe | kke | Living |
| Kakanda | kka | Living |
| Kaki Ae | tbd | Living |
| Kako | kkj | Living |
| Kakwa | keo | Living |
| Kala Lagaw Ya | mwp | Living |
| Kalaallisut | kal | Living |
| Kalaamaya | lkm | Extinct |
| Kalabakan | kve | Living |
| Kalabari | ijn | Living |
| Kalabra | kzz | Living |
| Kalagan | kqe | Living |
| Kalaktang Monpa | kkf | Living |
| Kalam | kmh | Living |
| Kalami | gwc | Living |
| Kalamsé | knz | Living |
| Kalanadi | wkl | Living |
| Kalanga | kck | Living |
| Kalao | kly | Living |
| Kalapuya | kyl | Living |
| Kalarko | kba | Extinct |
| Kalasha | kls | Living |
| Kalenjin | kln | Living |
| Kalispel-Pend d'Oreille | fla | Living |
| Kalkoti | xka | Living |
| Kalkutung | ktg | Extinct |
| Kalmyk | xal | Living |
| Kalo Finnish Romani | rmf | Living |
| Kalou | ywa | Living |
| Kaluli | bco | Living |
| Kalumpang | kli | Living |
| Kam | kdx | Living |
| Kamakan | vkm | Extinct |
| Kamang | woi | Living |
| Kamano | kbq | Living |
| Kamantan | kci | Living |
| Kamar | keq | Living |
| Kamara | jmr | Living |
| Kamarian | kzx | Living |
| Kamaru | kgx | Living |
| Kamas | xas | Extinct |
| Kamasa | klp | Living |
| Kamasau | kms | Living |
| Kamayo | kyk | Living |
| Kamayurá | kay | Living |
| Kamba (Brazil) | xba | Extinct |
| Kamba (Kenya) | kam | Living |
| Kambaata | ktb | Living |
| Kambaira | kyy | Living |
| Kambera | xbr | Living |
| Kamberau | irx | Living |
| Kambiwá | xbw | Extinct |
| Kami (Nigeria) | kmi | Living |
| Kami (Tanzania) | kcu | Living |
| Kamo | kcq | Living |
| Kamoro | kgq | Living |
| Kamu | xmu | Extinct |
| Kamula | xla | Living |
| Kamviri | xvi | Living |
| Kamwe | hig | Living |
| Kanakanabu | xnb | Living |
| Kanamarí | knm | Living |
| Kanan | zkn | Living |
| Kanashi | xns | Living |
| Kanasi | soq | Living |
| Kanauji | bjj | Living |
| Kandas | kqw | Living |
| Kandawo | gam | Living |
| Kande | kbs | Living |
| Kanembu | kbl | Living |
| Kang | kyp | Living |
| Kanga | kcp | Living |
| Kangean | kkv | Living |
| Kanggape | igm | Living |
| Kangjia | kxs | Living |
| Kango (Bas-Uélé District) | kty | Living |
| Kango (Tshopo District) | kzy | Living |
| Kangri | xnr | Living |
| Kaniet | ktk | Extinct |
| Kanikkaran | kev | Living |
| Kaningdon-Nindem | kdp | Living |
| Kaningi | kzo | Living |
| Kaningra | knr | Living |
| Kaninuwa | wat | Living |
| Kanite | kmu | Living |
| Kanjari | kft | Living |
| Kanju | kbe | Living |
| Kankanaey | kne | Living |
| Kannada | kan | Living |
| Kannada Kurumba | kfi | Living |
| Kanoé | kxo | Extinct |
| Kanowit-Tanjong Melanau | kxn | Living |
| Kansa | ksk | Living |
| Kantosi | xkt | Living |
| Kanu | khx | Living |
| Kanufi | kni | Living |
| Kanuri | kau | Living |
| Kanyok | kny | Living |
| Kao | kax | Living |
| Kaonde | kqn | Living |
| Kap | ykm | Living |
| Kapin | tbx | Living |
| Kapinawá | xpn | Extinct |
| Kapingamarangi | kpg | Living |
| Kapori | khp | Living |
| Kapriman | dju | Living |
| Kaptiau | kbi | Living |
| Kapya | klo | Living |
| Kaqchikel | cak | Living |
| Kara (Central African Republic) | kah | Living |
| Kara (Korea) | zra | Extinct |
| Kara (Papua New Guinea) | leu | Living |
| Kara (Tanzania) | reg | Living |
| Karachay-Balkar | krc | Living |
| Karadjeri | gbd | Living |
| Karagas | kim | Living |
| Karahawyana | xkh | Living |
| Karaim | kdr | Living |
| Karajá | kpj | Living |
| Kara-Kalpak | kaa | Living |
| Karakhanid | xqa | Historic |
| Karami | xar | Extinct |
| Karamojong | kdj | Living |
| Karang | kzr | Living |
| Karanga | kth | Living |
| Karankawa | zkk | Extinct |
| Karao | kyj | Living |
| Karas | kgv | Living |
| Karata | kpt | Living |
| Karawa | xrw | Living |
| Karbi | mjw | Living |
| Kare (Central African Republic) | kbn | Living |
| Kare (Papua New Guinea) | kmf | Living |
| Karekare | kai | Living |
| Karelian | krl | Living |
| Karenggapa | eaa | Extinct |
| Karey | kyd | Living |
| Kari | kbj | Living |
| Karingani | kgn | Living |
| Karipuna | kuq | Living |
| Karipúna | kgm | Extinct |
| Karipúna Creole French | kmv | Living |
| Karirí-Xocó | kzw | Extinct |
| Karitiâna | ktn | Living |
| Kariya | kil | Living |
| Kariyarra | vka | Extinct |
| Karkar-Yuri | yuj | Living |
| Karkin | krb | Extinct |
| Karko | kko | Living |
| Karnai | bbv | Living |
| Karo (Brazil) | arr | Living |
| Karo (Ethiopia) | kxh | Living |
| Karok | kyh | Living |
| Karon | krx | Living |
| Karon Dori | kgw | Living |
| Karore | xkx | Living |
| Karranga | xrq | Extinct |
| Karuwali | rxw | Extinct |
| Kasanga | ccj | Living |
| Kasem | xsm | Living |
| Kashaya | kju | Living |
| Kashmiri | kas | Living |
| Kashubian | csb | Living |
| Kasiguranin | ksn | Living |
| Kaska | kkz | Living |
| Kaskean | zsk | Ancient |
| Kasseng | kgc | Living |
| Kasua | khs | Living |
| Kataang | kgd | Living |
| Katabaga | ktq | Extinct |
| Katawixi | xat | Living |
| Katbol | tmb | Living |
| Katcha-Kadugli-Miri | xtc | Living |
| Kâte | kmg | Living |
| Kathoriya Tharu | tkt | Living |
| Kathu | ykt | Living |
| Kati | bsh | Living |
| Katkari | kfu | Living |
| Katla | kcr | Living |
| Kato | ktw | Extinct |
| Katso | kaf | Living |
| Katua | kta | Living |
| Katukína | kav | Living |
| Kaulong | pss | Living |
| Kaur | vkk | Living |
| Kaure | bpp | Living |
| Kaurna | zku | Extinct |
| Kauwera | xau | Living |
| Kavalan | ckv | Living |
| Kavet | krv | Living |
| Kawacha | kcb | Living |
| Kawaiisu | xaw | Living |
| Kawe | kgb | Living |
| Kawi | kaw | Ancient |
| Kaxararí | ktx | Living |
| Kaxuiâna | kbb | Extinct |
| Kayabí | kyz | Living |
| Kayagar | kyt | Living |
| Kayan | pdu | Living |
| Kayan Mahakam | xay | Living |
| Kayan River Kayan | xkn | Living |
| Kayapa Kallahan | kak | Living |
| Kayapó | txu | Living |
| Kayardild | gyd | Living |
| Kayaw | kvl | Living |
| Kayeli | kzl | Living |
| Kayong | kxy | Living |
| Kayort | kyv | Living |
| Kaytetye | gbb | Living |
| Kayupulau | kzu | Living |
| Kazakh | kaz | Living |
| Kazukuru | kzk | Extinct |
| Keak | keh | Living |
| Keapara | khz | Living |
| Kedah Malay | meo | Living |
| Kedang | ksx | Living |
| Keder | kdy | Living |
| Kehu | khh | Living |
| Kei | kei | Living |
| Keiga | kec | Living |
| Kein | bmh | Living |
| Keiyo | eyo | Living |
| Kekchí | kek | Living |
| Kela (Democratic Republic of Congo) | kel | Living |
| Kela (Papua New Guinea) | kcl | Living |
| Kelabit | kzi | Living |
| Kélé | keb | Living |
| Kele (Democratic Republic of Congo) | khy | Living |
| Kele (Papua New Guinea) | sbc | Living |
| Kelengaxo Bozo | bzx | Living |
| Keley-I Kallahan | ify | Living |
| Keliko | kbo | Living |
| Kelo | xel | Living |
| Kelon | kyo | Living |
| Kemak | kem | Living |
| Kembayan | xem | Living |
| Kemberano | bzp | Living |
| Kembra | xkw | Living |
| Kemedzung | dmo | Living |
| Kemi Sami | sjk | Extinct |
| Kemiehua | kfj | Living |
| Kemtuik | kmt | Living |
| Kenaboi | xbn | Extinct |
| Kenati | gat | Living |
| Kendayan | knx | Living |
| Kendeje | klf | Living |
| Kendem | kvm | Living |
| Kenga | kyq | Living |
| Keningau Murut | kxi | Living |
| Keninjal | knl | Living |
| Kensiu | kns | Living |
| Kenswei Nsei | ndb | Living |
| Kenyan Sign Language | xki | Living |
| Kenyang | ken | Living |
| Kenyi | lke | Living |
| Kenzi | xnz | Living |
| Ke'o | xxk | Living |
| Keoru-Ahia | xeu | Living |
| Kepkiriwát | kpn | Extinct |
| Kepo' | kuk | Living |
| Kera | ker | Living |
| Kerak | hhr | Living |
| Kereho | xke | Living |
| Kerek | krk | Extinct |
| Kerewe | ked | Living |
| Kerewo | kxz | Living |
| Kerinci | kvr | Living |
| Kesawai | xes | Living |
| Ket | ket | Living |
| Ketangalan | kae | Extinct |
| Kete | kcv | Living |
| Ketengban | xte | Living |
| Ketum | ktt | Living |
| Keyagana | kyg | Living |
| Kgalagadi | xkv | Living |
| Khakas | kjh | Living |
| Khalaj | kjf | Living |
| Khaling | klr | Living |
| Khamba | kbg | Living |
| Khams Tibetan | khg | Living |
| Khamti | kht | Living |
| Khamyang | ksu | Living |
| Khana | ogo | Living |
| Khandesi | khn | Living |
| Kháng | kjm | Living |
| Khanty | kca | Living |
| Khao | xao | Living |
| Kharam Naga | kfw | Living |
| Kharia | khr | Living |
| Kharia Thar | ksy | Living |
| Khasi | kha | Living |
| Khayo | lko | Living |
| Khazar | zkz | Extinct |
| Khe | kqg | Living |
| Khehek | tlx | Living |
| Khengkha | xkf | Living |
| Khetrani | xhe | Living |
| Khezha Naga | nkh | Living |
| Khiamniungan Naga | kix | Living |
| Khinalugh | kjj | Living |
| Khirwar | kwx | Living |
| Khisa | kqm | Living |
| Khlor | llo | Living |
| Khlula | ykl | Living |
| Khmu | kjg | Living |
| Khoekhoe | naq | Living |
| Khoibu Naga | nkb | Living |
| Kho'ini | xkc | Living |
| Kholok | ktc | Living |
| Khorasani Turkish | kmz | Living |
| Khorezmian | zkh | Extinct |
| Khotanese | kho | Ancient |
| Khowar | khw | Living |
| Khua | xhv | Living |
| Khuen | khf | Living |
| Khumi Chin | cnk | Living |
| Khün | kkh | Living |
| Khunsari | kfm | Living |
| Khvarshi | khv | Living |
| Khwe | hnh | Living |
| Kibet | kie | Living |
| Kibiri | prm | Living |
| K'iche' | quc | Living |
| Kickapoo | kic | Living |
| Kikai | kzg | Living |
| Kikuyu | kik | Living |
| Kildin Sami | sjd | Living |
| Kilivila | kij | Living |
| Kiliwa | klb | Living |
| Kilmeri | kih | Living |
| Kim | kia | Living |
| Kim Mun | mji | Living |
| Kimaama | kig | Living |
| Kimaragang | kqr | Living |
| Kimbu | kiv | Living |
| Kimbundu | kmb | Living |
| Kimki | sbt | Living |
| Kimré | kqp | Living |
| Kinabalian | cbw | Living |
| Kinalakna | kco | Living |
| Kinamiging Manobo | mkx | Living |
| Kinaray-A | krj | Living |
| Kinga | zga | Living |
| Kinnauri | kfk | Living |
| Kintaq | knq | Living |
| Kinuku | kkd | Living |
| Kinyarwanda | kin | Living |
| Kioko | ues | Living |
| Kiong | kkm | Living |
| Kiorr | xko | Living |
| Kiowa | kio | Living |
| Kiowa Apache | apk | Living |
| Kipsigis | sgc | Living |
| Kiput | kyi | Living |
| Kir-Balar | kkr | Living |
| Kire | geb | Living |
| Kirghiz | kir | Living |
| Kirike | okr | Living |
| Kirikiri | kiy | Living |
| Kirmanjki (individual language) | kiu | Living |
| Kirya-Konzel | fkk | Living |
| Kis | kis | Living |
| Kisa | lks | Living |
| Kisan | xis | Living |
| Kisankasa | kqh | Living |
| Kisar | kje | Living |
| Kisi | kiz | Living |
| Kistane | gru | Living |
| Kita Maninkakan | mwk | Living |
| Kitan | zkt | Extinct |
| Kitja | gia | Living |
| Kitsai | kii | Extinct |
| Kituba (Congo) | mkw | Living |
| Kituba (Democratic Republic of Congo) | ktu | Living |
| Kiunum | wei | Living |
| Kla-Dan | lda | Living |
| Klamath-Modoc | kla | Extinct |
| Klao | klu | Living |
| Klias River Kadazan | kqt | Living |
| Klingon | tlh | Constructed |
| Knaanic | czk | Extinct |
| Ko | fuj | Living |
| Koalib | kib | Living |
| Koasati | cku | Living |
| Koba | kpd | Living |
| Kobiana | kcj | Living |
| Kobol | kgu | Living |
| Kobon | kpw | Living |
| Koch | kdq | Living |
| Kochila Tharu | thq | Living |
| Koda | cdz | Living |
| Kodaku | ksz | Living |
| Kodava | kfa | Living |
| Kodeoha | vko | Living |
| Kodi | kod | Living |
| Kodia | kwp | Living |
| Koenoem | kcs | Living |
| Kofa | kso | Living |
| Kofei | kpi | Living |
| Kofyar | kwl | Living |
| Koguryo | zkg | Extinct |
| Kohin | kkx | Living |
| Kohistani Shina | plk | Living |
| Koho | kpm | Living |
| Kohumono | bcs | Living |
| Koi | kkt | Living |
| Koibal | zkb | Extinct |
| Koireng | nkd | Living |
| Koitabu | kqi | Living |
| Koiwat | kxt | Living |
| Kok Borok | trp | Living |
| Kokata | ktd | Living |
| Koke | kou | Living |
| Koki Naga | nxk | Living |
| Kok-Nar | gko | Extinct |
| Koko Babangk | okg | Extinct |
| Kokoda | xod | Living |
| Kokola | kzn | Living |
| Kokota | kkk | Living |
| Kol (Bangladesh) | ekl | Living |
| Kol (Cameroon) | biw | Living |
| Kol (Papua New Guinea) | kol | Living |
| Kola | kvv | Living |
| Kolbila | klc | Living |
| Kolibugan Subanon | skn | Living |
| Kölsch | ksh | Living |
| Koluwawa | klx | Living |
| Kom (Cameroon) | bkm | Living |
| Kom (India) | kmm | Living |
| Koma | kmy | Living |
| Komba | kpf | Living |
| Kombai | tyn | Living |
| Kombio | xbi | Living |
| Komering | kge | Living |
| Komi | kom | Living |
| Kominimung | xoi | Living |
| Komi-Permyak | koi | Living |
| Komi-Zyrian | kpv | Living |
| Komo (Democratic Republic of Congo) | kmw | Living |
| Komo (Sudan) | xom | Living |
| Komodo | kvh | Living |
| Kompane | kvp | Living |
| Komyandaret | kzv | Living |
| Kon Keu | kkn | Living |
| Konai | kxw | Living |
| Konda | knd | Living |
| Konda-Dora | kfc | Living |
| Koneraw | kdw | Living |
| Kongo | kon | Living |
| Konkani (individual language) | knn | Living |
| Konkani (macrolanguage) | kok | Living |
| Konkomba | xon | Living |
| Konni | kma | Living |
| Kono (Guinea) | knu | Living |
| Kono (Nigeria) | klk | Living |
| Kono (Sierra Leone) | kno | Living |
| Konomala | koa | Living |
| Konongo | kcz | Living |
| Konso | kxc | Living |
| Konyak Naga | nbe | Living |
| Konyanka Maninka | mku | Living |
| Konzo | koo | Living |
| Koongo | kng | Living |
| Koonzime | ozm | Living |
| Koorete | kqy | Living |
| Kopar | xop | Living |
| Kopkaka | opk | Living |
| Korafe-Yegha | kpr | Living |
| Korak | koz | Living |
| Korana | kqz | Extinct |
| Korandje | kcy | Living |
| Korean | kor | Living |
| Korean Sign Language | kvk | Living |
| Koreguaje | coe | Living |
| Koresh-e Rostam | okh | Living |
| Korku | kfq | Living |
| Korlai Creole Portuguese | vkp | Living |
| Koro (Côte d'Ivoire) | kfo | Living |
| Koro (India) | jkr | Living |
| Koro (Papua New Guinea) | kxr | Living |
| Koro (Vanuatu) | krf | Living |
| Koro Wachi | bqv | Living |
| Koromfé | kfz | Living |
| Koromira | kqj | Living |
| Koronadal Blaan | bpr | Living |
| Koroni | xkq | Living |
| Korop | krp | Living |
| Koropó | xxr | Extinct |
| Koroshi | ktl | Living |
| Korowai | khe | Living |
| Korra Koraga | kfd | Living |
| Korubo | xor | Living |
| Korupun-Sela | kpq | Living |
| Korwa | kfp | Living |
| Koryak | kpy | Living |
| Kosadle | kiq | Living |
| Kosarek Yale | kkl | Living |
| Kosena | kze | Living |
| Koshin | kid | Living |
| Kosraean | kos | Living |
| Kota (Gabon) | koq | Living |
| Kota (India) | kfe | Living |
| Kota Bangun Kutai Malay | mqg | Living |
| Kota Marudu Talantang | grm | Living |
| Kota Marudu Tinagas | ktr | Living |
| Kotafon Gbe | kqk | Living |
| Kotava | avk | Constructed |
| Koti | eko | Living |
| Kott | zko | Extinct |
| Kouya | kyf | Living |
| Kovai | kqb | Living |
| Kove | kvc | Living |
| Kowaki | xow | Living |
| Kowiai | kwh | Living |
| Koy Sanjaq Surat | kqd | Living |
| Koya | kff | Living |
| Koyaga | kga | Living |
| Koyo | koh | Living |
| Koyra Chiini Songhay | khq | Living |
| Koyraboro Senni Songhai | ses | Living |
| Koyukon | koy | Living |
| Kpagua | kuw | Living |
| Kpala | kpl | Living |
| Kpan | kpk | Living |
| Kpasam | pbn | Living |
| Kpati | koc | Extinct |
| Kpatili | kym | Living |
| Kpeego | cpo | Living |
| Kpelle | kpe | Living |
| Kpessi | kef | Living |
| Kplang | kph | Living |
| Krache | kye | Living |
| Krahô | xra | Living |
| Kraol | rka | Living |
| Krenak | kqq | Living |
| Krevinian | zkv | Extinct |
| Kreye | xre | Living |
| Krikati-Timbira | xri | Living |
| Krim | krm | Living |
| Krio | kri | Living |
| Kriol | rop | Living |
| Krisa | ksi | Living |
| Krobu | kxb | Living |
| Krongo | kgo | Living |
| Kru'ng 2 | krr | Living |
| Krymchak | jct | Living |
| Kryts | kry | Living |
| Kua | tyu | Living |
| Kuamasi | yku | Living |
| Kuan | uan | Living |
| Kuanhua | xnh | Living |
| Kua-nsi | ykn | Living |
| Kuanua | ksd | Living |
| Kuanyama | kua | Living |
| Kube | kgf | Living |
| Kubi | kof | Extinct |
| Kubo | jko | Living |
| Kubu | kvb | Living |
| Kucong | lkc | Living |
| Kudiya | kfg | Living |
| Kudmali | kyw | Living |
| Kudu-Camo | kov | Living |
| Kugama | kow | Living |
| Kugbo | kes | Living |
| Kui (India) | kxu | Living |
| Kui (Indonesia) | kvd | Living |
| Kuijau | dkr | Living |
| Kuikúro-Kalapálo | kui | Living |
| Kujarge | vkj | Living |
| Kuk | kfn | Living |
| Kukatja | kux | Living |
| Kuke | ght | Living |
| Kukele | kez | Living |
| Kukna | kex | Living |
| Kuku-Mangk | xmq | Extinct |
| Kuku-Mu'inh | xmp | Extinct |
| Kuku-Muminh | xmh | Living |
| Kuku-Ugbanh | ugb | Extinct |
| Kuku-Uwanh | uwa | Living |
| Kuku-Yalanji | gvn | Living |
| Kula | tpg | Living |
| Kulere | kul | Living |
| Kulfa | kxj | Living |
| Kulina Pano | xpk | Living |
| Kulisusu | vkl | Living |
| Kullu Pahari | kfx | Living |
| Kulon-Pazeh | uun | Living |
| Kulung (Nepal) | kle | Living |
| Kulung (Nigeria) | bbu | Living |
| Kumalu | ksl | Living |
| Kumam | kdi | Living |
| Kuman (Papua New Guinea) | kue | Living |
| Kuman (Russia) | qwm | Extinct |
| Kumaoni | kfy | Living |
| Kumarbhag Paharia | kmj | Living |
| Kumba | ksm | Living |
| Kumbainggar | kgs | Living |
| Kumbaran | wkb | Living |
| Kumbewaha | xks | Living |
| Kumhali | kra | Living |
| Kumiai | dih | Living |
| Kumukio | kuo | Living |
| Kumyk | kum | Living |
| Kumzari | zum | Living |
| Kunama | kun | Living |
| Kunbarlang | wlg | Living |
| Kunda | kdn | Living |
| Kundal Shahi | shd | Living |
| Kunduvadi | wku | Living |
| Kung | kfl | Living |
| Kungarakany | ggk | Extinct |
| Kungardutyi | gdt | Extinct |
| Kung-Ekoka | knw | Living |
| Kunggara | kvs | Living |
| Kunggari | kgl | Extinct |
| Kungkari | lku | Extinct |
| Kuni | kse | Living |
| Kuni-Boazi | kvg | Living |
| Kunigami | xug | Living |
| Kunimaipa | kup | Living |
| Kunja | pep | Living |
| Kunjen | kjn | Living |
| Kunyi | njx | Living |
| Kunza | kuz | Extinct |
| Kuo | xuo | Living |
| Kuot | kto | Living |
| Kupa | kug | Living |
| Kupang Malay | mkn | Living |
| Kupia | key | Living |
| Kupsabiny | kpz | Living |
| Kur | kuv | Living |
| Kura Ede Nago | nqk | Living |
| Kurama | krh | Living |
| Kuranko | knk | Living |
| Kurdish | kur | Living |
| Kuri | nbn | Living |
| Kuria | kuj | Living |
| Kurichiya | kfh | Living |
| Kurmukar | kfv | Living |
| Kurnai | unn | Living |
| Kurrama | vku | Living |
| Kurti | ktm | Living |
| Kurtokha | xkz | Living |
| Kuruáya | kyr | Living |
| Kurudu | kjr | Living |
| Kurukh | kru | Living |
| Kusaal | kus | Living |
| Kusaghe | ksg | Living |
| Kushi | kuh | Living |
| Kusu | ksv | Living |
| Kusunda | kgg | Living |
| Kutenai | kut | Living |
| Kutep | kub | Living |
| Kuthant | xut | Extinct |
| Kutong | skm | Living |
| Kutto | kpa | Living |
| Kutu | kdc | Living |
| Kuturmi | khj | Living |
| Kuuku-Ya'u | kuy | Living |
| Kuuk-Yak | uky | Extinct |
| Kuvi | kxv | Living |
| Kuwaa | blh | Living |
| Kuwaataay | cwt | Living |
| Kuy | kdt | Living |
| Kven Finnish | fkv | Living |
| Kwa | kwb | Living |
| Kwa' | bko | Living |
| Kwaami | ksq | Living |
| Kwadi | kwz | Extinct |
| Kw'adza | wka | Extinct |
| Kwaio | kwd | Living |
| Kwaja | kdz | Living |
| Kwakiutl | kwk | Living |
| Kwakum | kwu | Living |
| Kwalhioqua-Tlatskanai | qwt | Extinct |
| Kwama | kmq | Living |
| Kwambi | kwm | Living |
| Kwamera | tnk | Living |
| Kwami | ktf | Living |
| Kwamtim One | okk | Living |
| Kwang | kvi | Living |
| Kwanga | kwj | Living |
| Kwangali | kwn | Living |
| Kwanja | knp | Living |
| Kwara'ae | kwf | Living |
| Kwasio | nmg | Living |
| Kwaya | kya | Living |
| Kwaza | xwa | Living |
| Kwegu | xwg | Living |
| Kwer | kwr | Living |
| Kwerba | kwe | Living |
| Kwerba Mamberamo | xwr | Living |
| Kwere | cwe | Living |
| Kwerisa | kkb | Living |
| Kwese | kws | Living |
| Kwesten | kwt | Living |
| Kwini | gww | Living |
| Kwinsu | kuc | Living |
| Kwinti | kww | Living |
| Kwoma | kmo | Living |
| Kwomtari | kwo | Living |
| Kxoe | xuu | Living |
| Kyak | bka | Living |
| Kyaka | kyc | Living |
| Kyanga | tye | Living |
| Kyan-Karyaw Naga | nqq | Living |
| Kyenele | kql | Living |
| Kyerung | kgy | Living |
| Láá Láá Bwamu | bwj | Living |
| Láadan | ldn | Constructed |
| Laal | gdm | Living |
| Laari | ldi | Living |
| Laba | lau | Living |
| Label | lbb | Living |
| La'bi | lbi | Living |
| Labir | jku | Living |
| Labo | mwi | Living |
| Labo Phowa | ypb | Living |
| Labu | lbu | Living |
| Labuk-Kinabatangan Kadazan | dtb | Living |
| Lacandon | lac | Living |
| Lachi | lbt | Living |
| Lachiguiri Zapotec | zpa | Living |
| Lachixío Zapotec | zpl | Living |
| Ladakhi | lbj | Living |
| Ladin | lld | Living |
| Ladino | lad | Living |
| Ladji Ladji | llj | Extinct |
| Laeko-Libuat | lkl | Living |
| Lafofa | laf | Living |
| Laghu | lgb | Living |
| Laghuu | lgh | Living |
| Lagwan | kot | Living |
| Laha (Indonesia) | lhh | Living |
| Laha (Viet Nam) | lha | Living |
| Lahanan | lhn | Living |
| Lahnda | lah | Living |
| Lahta Karen | kvt | Living |
| Lahu | lhu | Living |
| Lahu Shi | lhi | Living |
| Lahul Lohar | lhl | Living |
| Laimbue | lmx | Living |
| Laitu Chin | clj | Living |
| Laiyolo | lji | Living |
| Lak | lbe | Living |
| Laka (Chad) | lap | Living |
| Laka (Nigeria) | lak | Living |
| Lakalei | lka | Living |
| Lake Miwok | lmw | Living |
| Lakha | lkh | Living |
| Laki | lki | Living |
| Lakkia | lbc | Living |
| Lakon | lkn | Living |
| Lakondê | lkd | Living |
| Lakota | lkt | Living |
| Lakota Dida | dic | Living |
| Lala | nrz | Living |
| Lala-Bisa | leb | Living |
| Lalana Chinantec | cnl | Living |
| Lala-Roba | lla | Living |
| Lalia | lal | Living |
| Lama (Togo) | las | Living |
| Lama Bai | lay | Living |
| Lamaholot | slp | Living |
| Lamalera | lmr | Living |
| Lamang | hia | Living |
| Lamatuka | lmq | Living |
| Lamba | lam | Living |
| Lambadi | lmn | Living |
| Lambayeque Quechua | quf | Living |
| Lambichhong | lmh | Living |
| Lamboya | lmy | Living |
| Lambya | lai | Living |
| Lame | bma | Living |
| Lamenu | lmu | Living |
| Lamet | lbn | Living |
| Lamja-Dengsa-Tola | ldh | Living |
| Lamkang | lmk | Living |
| Lamma | lev | Living |
| Lamnso' | lns | Living |
| Lamogai | lmg | Living |
| Lampung Api | ljp | Living |
| Lampung Nyo | abl | Living |
| Lamu | llh | Living |
| Lamu-Lamu | lby | Extinct |
| Lanas Lobu | ruu | Living |
| Landoma | ldm | Living |
| Langam | lnm | Living |
| Langbashe | lna | Living |
| Lang'e | yne | Living |
| Langi | lag | Living |
| Langnian Buyang | yln | Living |
| Lango (Sudan) | lno | Living |
| Lango (Uganda) | laj | Living |
| Langobardic | lng | Ancient |
| Langue des signes de Belgique Francophone | sfb | Living |
| Lanima | lnw | Extinct |
| Lanoh | lnh | Living |
| Lao | lao | Living |
| Lao Naga | nlq | Living |
| Laomian | lwm | Living |
| Laopang | lbg | Living |
| Laos Sign Language | lso | Living |
| Lapaguía-Guivini Zapotec | ztl | Living |
| Laragia | lrg | Extinct |
| Larantuka Malay | lrt | Living |
| Lardil | lbz | Living |
| Larevat | lrv | Living |
| Large Flowery Miao | hmd | Living |
| Lari | lrl | Living |
| Larike-Wakasihu | alo | Living |
| Laro | lro | Living |
| Larteh | lar | Living |
| Laru | lan | Living |
| Lasalimu | llm | Living |
| Lasgerdi | lsa | Living |
| Lashi | lsi | Living |
| Lasi | lss | Living |
| Late Middle Chinese | ltc | Historic |
| Latgalian | ltg | Living |
| Latin | lat | Ancient |
| Latu | ltu | Living |
| Latundê | ltn | Living |
| Latvian | lav | Living |
| Latvian Sign Language | lsl | Living |
| Lau | llu | Living |
| Laua | luf | Living |
| Lauan | llx | Living |
| Lauje | law | Living |
| Laura | lur | Living |
| Laurentian | lre | Extinct |
| Lautu Chin | clt | Living |
| Lavatbura-Lamusong | lbv | Living |
| Lave | brb | Living |
| Laven | lbo | Living |
| Lavukaleve | lvk | Living |
| Lawangan | lbx | Living |
| Lawu | lwu | Living |
| Lawunuia | tgi | Living |
| Layakha | lya | Living |
| Laz | lzz | Living |
| Lealao Chinantec | cle | Living |
| Leco | lec | Living |
| Ledo Kaili | lew | Living |
| Leelau | ldk | Living |
| Lefa | lfa | Living |
| Lega-Mwenga | lgm | Living |
| Lega-Shabunda | lea | Living |
| Legbo | agb | Living |
| Legenyem | lcc | Living |
| Lehali | tql | Living |
| Lehalurup | urr | Living |
| Lehar | cae | Living |
| Leinong Naga | lzn | Living |
| Leipon | lek | Living |
| Lelak | llk | Extinct |
| Lele (Chad) | lln | Living |
| Lele (Democratic Republic of Congo) | lel | Living |
| Lele (Guinea) | llc | Living |
| Lele (Papua New Guinea) | lle | Living |
| Lelemi | lef | Living |
| Lelepa | lpa | Living |
| Lembena | leq | Living |
| Lemerig | lrz | Living |
| Lemio | lei | Living |
| Lemnian | xle | Ancient |
| Lemolang | ley | Living |
| Lemoro | ldj | Living |
| Lenakel | tnl | Living |
| Lenca | len | Extinct |
| Lendu | led | Living |
| Lengilu | lgi | Living |
| Lengo | lgr | Living |
| Lengola | lej | Living |
| Leningitij | lnj | Extinct |
| Lenje | leh | Living |
| Lenkau | ler | Living |
| Lenyima | ldg | Living |
| Lepcha | lep | Living |
| Lepki | lpe | Living |
| Lepontic | xlp | Ancient |
| Lere | gnh | Living |
| Lese | les | Living |
| Lesing-Gelimi | let | Living |
| Letemboi | nms | Living |
| Leti (Cameroon) | leo | Living |
| Leti (Indonesia) | lti | Living |
| Levuka | lvu | Living |
| Lewo | lww | Living |
| Lewo Eleng | lwe | Living |
| Lewotobi | lwt | Living |
| Leyigha | ayi | Living |
| Lezghian | lez | Living |
| Lhokpu | lhp | Living |
| Lhomi | lhm | Living |
| Liabuku | lix | Living |
| Liana-Seti | ste | Living |
| Liangmai Naga | njn | Living |
| Lianshan Zhuang | zln | Living |
| Liberia Kpelle | xpe | Living |
| Liberian English | lir | Living |
| Libido | liq | Living |
| Libinza | liz | Living |
| Libon Bikol | lbl | Living |
| Liburnian | xli | Ancient |
| Libyan Arabic | ayl | Living |
| Libyan Sign Language | lbs | Living |
| Ligbi | lig | Living |
| Ligenza | lgz | Living |
| Ligurian | lij | Living |
| Ligurian (Ancient) | xlg | Ancient |
| Lihir | lih | Living |
| Lijili | mgi | Living |
| Lika | lik | Living |
| Liki | lio | Living |
| Likila | lie | Living |
| Likuba | kxx | Living |
| Likum | lib | Living |
| Likwala | kwc | Living |
| Lilau | lll | Living |
| Lillooet | lil | Living |
| Limassa | bme | Living |
| Limbu | lif | Living |
| Limbum | lmp | Living |
| Limburgan | lim | Living |
| Limi | ylm | Living |
| Limilngan | lmc | Extinct |
| Limos Kalinga | kmk | Living |
| Lindu | klw | Living |
| Linear A | lab | Ancient |
| Lingala | lin | Living |
| Lingao | onb | Living |
| Lingarak | lgk | Living |
| Lingua Franca | pml | Extinct |
| Lingua Franca Nova | lfn | Constructed |
| Li'o | ljl | Living |
| Lipan Apache | apl | Living |
| Lipo | lpo | Living |
| Lisabata-Nuniali | lcs | Living |
| Lisela | lcl | Living |
| Lish | lsh | Living |
| Lishán Didán | trg | Living |
| Lishana Deni | lsd | Living |
| Lishanid Noshan | aij | Living |
| Lisu | lis | Living |
| Literary Chinese | lzh | Historic |
| Lithuanian | lit | Living |
| Lithuanian Sign Language | lls | Living |
| Litzlitz | lzl | Living |
| Liujiang Zhuang | zlj | Living |
| Liuqian Zhuang | zlq | Living |
| Liv | liv | Living |
| Livvi | olo | Living |
| Loarki | lrk | Living |
| Lobala | loq | Living |
| Lobi | lob | Living |
| Lodhi | lbm | Living |
| Logba | lgq | Living |
| Logo | log | Living |
| Logol | lof | Living |
| Logooli | rag | Living |
| Logorik | liu | Living |
| Logudorese Sardinian | src | Living |
| Lohorung | lbr | Living |
| Loja Highland Quichua | qvj | Living |
| Lojban | jbo | Constructed |
| Lokaa | yaz | Living |
| Loke | loy | Living |
| Loko | lok | Living |
| Lokoya | lky | Living |
| Lola | lcd | Living |
| Lolak | llq | Living |
| Lole | llg | Living |
| Lolo | llb | Living |
| Loloda | loa | Living |
| Lolopo | ycl | Living |
| Loma (Côte d'Ivoire) | loi | Living |
| Loma (Liberia) | lom | Living |
| Lomaiviti | lmv | Living |
| Lomavren | rmi | Living |
| Lombard | lmo | Living |
| Lombi | lmi | Living |
| Lombo | loo | Living |
| Lomwe | ngl | Living |
| Loncong | lce | Living |
| Long Phuri Naga | lpn | Living |
| Long Wat | ttw | Living |
| Longgu | lgu | Living |
| Longto | wok | Living |
| Longuda | lnu | Living |
| Loniu | los | Living |
| Lonwolwol | crc | Living |
| Lonzo | lnz | Living |
| Loo | ldo | Living |
| Lopa | lop | Living |
| Lopi | lov | Living |
| Lopit | lpx | Living |
| Lorang | lrn | Living |
| Lorediakarkar | lnn | Living |
| Loreto-Ucayali Spanish | spq | Living |
| Lote | uvl | Living |
| Lotha Naga | njh | Living |
| Lo-Toga | lht | Living |
| Lotud | dtr | Living |
| Lou | loj | Living |
| Louisiana Creole French | lou | Living |
| Loun | lox | Living |
| Loup A | xlo | Extinct |
| Loup B | xlb | Extinct |
| Low German | nds | Living |
| Lower Burdekin | xbb | Extinct |
| Lower Chehalis | cea | Extinct |
| Lower Grand Valley Dani | dni | Living |
| Lower Silesian | sli | Living |
| Lower Sorbian | dsb | Living |
| Lower Southern Aranda | axl | Extinct |
| Lower Tanana | taa | Living |
| Lower Ta'oih | tto | Living |
| Lowland Oaxaca Chontal | clo | Living |
| Lowland Tarahumara | tac | Living |
| Loxicha Zapotec | ztp | Living |
| Lozi | loz | Living |
| Lü | khb | Living |
| Lua' | prb | Living |
| Luang | lex | Living |
| Luba-Katanga | lub | Living |
| Luba-Lulua | lua | Living |
| Lubila | kcc | Living |
| Lubu | lcf | Living |
| Lubuagan Kalinga | knb | Living |
| Luchazi | lch | Living |
| Lucumi | luq | Living |
| Ludian | lud | Living |
| Lufu | ldq | Living |
| Lugbara | lgg | Living |
| Luguru | ruf | Living |
| Luhu | lcq | Living |
| Lui | lba | Extinct |
| Luimbi | lum | Living |
| Luiseno | lui | Living |
| Lukpa | dop | Living |
| Lule | ule | Extinct |
| Lule Sami | smj | Living |
| Lumba-Yakkha | luu | Living |
| Lumbee | lmz | Extinct |
| Lumbu | lup | Living |
| Lumun | lmd | Living |
| Luna | luj | Living |
| Lunanakha | luk | Living |
| Lunda | lun | Living |
| Lundayeh | lnd | Living |
| Lungalunga | vmg | Living |
| Lungga | lga | Living |
| Luo (Cameroon) | luw | Living |
| Luo (Kenya and Tanzania) | luo | Living |
| Luopohe Hmong | hml | Living |
| Luri | ldd | Living |
| Lusengo | lse | Living |
| Lushai | lus | Living |
| Lushootseed | lut | Living |
| Lusi | khl | Living |
| Lusitanian | xls | Ancient |
| Lutos | ndy | Living |
| Luvale | lue | Living |
| Luwati | luv | Living |
| Luwo | lwo | Living |
| Luxembourgish | ltz | Living |
| Luyana | lyn | Living |
| Luyia | luy | Living |
| Lwalu | lwa | Living |
| Lycian | xlc | Ancient |
| Lydian | xld | Ancient |
| Lyélé | lee | Living |
| Lyngngam | lyg | Living |
| Lyons Sign Language | lsg | Living |
| Ma (Democratic Republic of Congo) | msj | Living |
| Ma (Papua New Guinea) | mjn | Living |
| Ma Manda | skc | Living |
| Maa | cma | Living |
| Maaka | mew | Living |
| Ma'anyan | mhy | Living |
| Maasina Fulfulde | ffm | Living |
| Maay | ymm | Living |
| Maba (Chad) | mde | Living |
| Maba (Indonesia) | mqa | Living |
| Mabaale | mmz | Living |
| Mabaan | mfz | Living |
| Mabaka Valley Kalinga | kkg | Living |
| Mabire | muj | Living |
| Maca | mca | Living |
| Macaguaje | mcl | Extinct |
| Macaguán | mbn | Living |
| Macanese | mzs | Living |
| Macedonian | mkd | Living |
| Macedo-Romanian | rup | Living |
| Machame | jmc | Living |
| Machiguenga | mcb | Living |
| Machinere | mpd | Living |
| Machinga | mvw | Living |
| Maco | wpc | Living |
| Macuna | myy | Living |
| Macushi | mbc | Living |
| Mada (Cameroon) | mxu | Living |
| Mada (Nigeria) | mda | Living |
| Madagascar Sign Language | mzc | Living |
| Madak | mmx | Living |
| Maden | xmx | Living |
| Madhi Madhi | dmd | Extinct |
| Madi | grg | Living |
| Ma'di | mhi | Living |
| Madngele | zml | Living |
| Madurese | mad | Living |
| Mae | mme | Living |
| Maek | hmk | Extinct |
| Maeng Itneg | itt | Living |
| Mafa | maf | Living |
| Mafea | mkv | Living |
| Magahi | mag | Living |
| Mag-antsi Ayta | sgb | Living |
| Magbukun Ayta | ayt | Living |
| Magdalena Peñasco Mixtec | xtm | Living |
| Mághdì | gmd | Living |
| Mag-Indi Ayta | blx | Living |
| Magiyi | gmg | Living |
| Magoma | gmx | Living |
| Magori | zgr | Living |
| Maguindanaon | mdh | Living |
| Mahali | mjx | Living |
| Maharastri Prakrit | pmh | Historic |
| Mahasu Pahari | bfz | Living |
| Mahican | mjy | Extinct |
| Mahongwe | mhb | Living |
| Mahou | mxx | Living |
| Mai Brat | ayz | Living |
| Maia | sks | Living |
| Maiadomu | mzz | Living |
| Maiani | tnh | Living |
| Maii | mmm | Living |
| Mailu | mgu | Living |
| Maindo | cwb | Living |
| Mainfränkisch | vmf | Living |
| Mainstream Kenyah | xkl | Living |
| Mairasi | zrs | Living |
| Maisin | mbq | Living |
| Maithili | mai | Living |
| Maiwa (Indonesia) | wmm | Living |
| Maiwa (Papua New Guinea) | mti | Living |
| Maiwala | mum | Living |
| Majang | mpe | Living |
| Majera | xmj | Living |
| Majhi | mjz | Living |
| Majhwar | mmj | Living |
| Majukayang Kalinga | kmd | Living |
| Mak (China) | mkg | Living |
| Mak (Nigeria) | pbl | Living |
| Makaa | mcp | Living |
| Makah | myh | Living |
| Makasae | mkz | Living |
| Makasar | mak | Living |
| Makassar Malay | mfp | Living |
| Makayam | aup | Living |
| Makhuwa | vmw | Living |
| Makhuwa-Marrevone | xmc | Living |
| Makhuwa-Meetto | mgh | Living |
| Makhuwa-Moniga | mhm | Living |
| Makhuwa-Saka | xsq | Living |
| Makhuwa-Shirima | vmk | Living |
| Maklew | mgf | Living |
| Makolkol | zmh | Extinct |
| Makonde | kde | Living |
| Maku'a | lva | Living |
| Makuráp | mpu | Living |
| Makuri Naga | jmn | Living |
| Makwe | ymk | Living |
| Makyan Naga | umn | Living |
| Mal | mlf | Living |
| Mal Paharia | mkb | Living |
| Mala (Nigeria) | ruy | Living |
| Mala (Papua New Guinea) | ped | Living |
| Mala Malasar | ima | Living |
| Malaccan Creole Malay | ccm | Living |
| Malaccan Creole Portuguese | mcm | Living |
| Malagasy | mlg | Living |
| Malalamai | mmt | Living |
| Malango | mln | Living |
| Malankuravan | mjo | Living |
| Malapandaram | mjp | Living |
| Malaryan | mjq | Extinct |
| Malas | mkr | Living |
| Malasar | ymr | Living |
| Malavedan | mjr | Living |
| Malawi Lomwe | lon | Living |
| Malawi Sena | swk | Living |
| Malay (individual language) | zlm | Living |
| Malay (macrolanguage) | msa | Living |
| Malayalam | mal | Living |
| Malayic Dayak | xdy | Living |
| Malaynon | mlz | Living |
| Malayo | mbp | Living |
| Malaysian Sign Language | xml | Living |
| Malba Birifor | bfo | Living |
| Male (Ethiopia) | mdy | Living |
| Male (Papua New Guinea) | mdc | Living |
| Malecite-Passamaquoddy | pqm | Living |
| Maléku Jaíka | gut | Living |
| Maleng | pkt | Living |
| Maleu-Kilenge | mgl | Living |
| Malfaxal | mlx | Living |
| Malgana | vml | Extinct |
| Malgbe | mxf | Living |
| Mali | gcc | Living |
| Malila | mgq | Living |
| Malimba | mzd | Living |
| Malimpung | mli | Living |
| Malinaltepec Me'phaa | tcf | Living |
| Malo | mla | Living |
| Malol | mbk | Living |
| Maltese | mlt | Living |
| Maltese Sign Language | mdl | Living |
| Malua Bay | mll | Living |
| Malvi | mup | Living |
| Malyangapa | yga | Extinct |
| Mam | mam | Living |
| Mama | mma | Living |
| Mamaa | mhf | Living |
| Mamaindé | wmd | Living |
| Mamanwa | mmn | Living |
| Mamara Senoufo | myk | Living |
| Mamasa | mqj | Living |
| Mambae | mgm | Living |
| Mambai | mcs | Living |
| Mamboru | mvd | Living |
| Mambwe-Lungu | mgr | Living |
| Mampruli | maw | Living |
| Mamuju | mqx | Living |
| Mamulique | emm | Extinct |
| Mamusi | kdf | Living |
| Mamvu | mdi | Living |
| Man Met | mml | Living |
| Manado Malay | xmm | Living |
| Manam | mva | Living |
| Manambu | mle | Living |
| Manangba | nmm | Living |
| Manangkari | znk | Extinct |
| Manchu | mnc | Living |
| Manda (Australia) | zma | Living |
| Manda (India) | mha | Living |
| Manda (Tanzania) | mgs | Living |
| Mandahuaca | mht | Living |
| Mandaic | mid | Living |
| Mandan | mhq | Living |
| Mandandanyi | zmk | Extinct |
| Mandar | mdr | Living |
| Mandara | tbf | Living |
| Mandari | mqu | Living |
| Mandarin Chinese | cmn | Living |
| Mandaya | mry | Living |
| Mandeali | mjl | Living |
| Mander | mqr | Living |
| Mandingo | man | Living |
| Mandinka | mnk | Living |
| Mandjak | mfv | Living |
| Mandobo Atas | aax | Living |
| Mandobo Bawah | bwp | Living |
| Manem | jet | Living |
| Mang | zng | Living |
| Manga Kanuri | kby | Living |
| Mangala | mem | Extinct |
| Mangarayi | mpc | Living |
| Mangareva | mrv | Living |
| Mangas | zns | Living |
| Mangayat | myj | Living |
| Mangbetu | mdj | Living |
| Mangbutu | mdk | Living |
| Mangerr | zme | Extinct |
| Mangga Buang | mmo | Living |
| Manggarai | mqy | Living |
| Mango | mge | Living |
| Mangole | mqc | Living |
| Mangseng | mbh | Living |
| Mangue | mom | Extinct |
| Manichaean Middle Persian | xmn | Historic |
| Manide | abd | Living |
| Manikion | mnx | Living |
| Manipa | mqp | Living |
| Manipuri | mni | Living |
| Mankanya | knf | Living |
| Manna-Dora | mju | Living |
| Mannan | mjv | Living |
| Mano | mev | Living |
| Manombai | woo | Living |
| Mansaka | msk | Living |
| Mansi | mns | Living |
| Mansoanka | msw | Living |
| Manta | myg | Living |
| Mantsi | nty | Living |
| Manumanaw Karen | kxf | Living |
| Manusela | wha | Living |
| Manx | glv | Living |
| Manya | mzj | Living |
| Manyawa | mny | Living |
| Manyika | mxc | Living |
| Manza | mzv | Living |
| Mao Naga | nbi | Living |
| Maonan | mmd | Living |
| Maore Comorian | swb | Living |
| Maori | mri | Living |
| Mape | mlh | Living |
| Mapena | mnm | Living |
| Mapia | mpy | Living |
| Mapidian | mpw | Living |
| Mapos Buang | bzh | Living |
| Mapoyo | mcg | Living |
| Mapudungun | arn | Living |
| Mapun | sjm | Living |
| Maquiritari | mch | Living |
| Mara | mec | Living |
| Mara Chin | mrh | Living |
| Marachi | lri | Living |
| Maraghei | vmh | Living |
| Maragus | mrs | Living |
| Maram Naga | nma | Living |
| Marama | lrm | Living |
| Maramba | myd | Living |
| Maranao | mrw | Living |
| Maranunggu | zmr | Living |
| Mararit | mgb | Living |
| Marathi | mar | Living |
| Marau | mvr | Living |
| Marba | mpg | Living |
| Maremgi | mrx | Living |
| Marenje | vmr | Living |
| Marfa | mvu | Living |
| Margany | zmc | Extinct |
| Marghi Central | mrt | Living |
| Marghi South | mfm | Living |
| Margos-Yarowilca-Lauricocha Quechua | qvm | Living |
| Margu | mhg | Living |
| Mari (East Sepik Province) | mbx | Living |
| Mari (Madang Province) | hob | Living |
| Mari (Russia) | chm | Living |
| Maria (India) | mrr | Living |
| Maria (Papua New Guinea) | mds | Living |
| Maricopa | mrc | Living |
| Maridan | zmd | Living |
| Maridjabin | zmj | Living |
| Marik | dad | Living |
| Marimanindji | zmm | Living |
| Marind | mrz | Living |
| Maring | mbw | Living |
| Maring Naga | nng | Living |
| Maringarr | zmt | Living |
| Marino | mrb | Living |
| Mariri | mqi | Living |
| Marithiel | mfr | Living |
| Maritime Sign Language | nsr | Living |
| Maritsauá | msp | Extinct |
| Mariyedi | zmy | Living |
| Marka | rkm | Living |
| Markweeta | enb | Living |
| Marma | rmz | Living |
| Marovo | mvo | Living |
| Marriammu | xru | Living |
| Marrucinian | umc | Ancient |
| Marshallese | mah | Living |
| Marsian | ims | Ancient |
| Martha's Vineyard Sign Language | mre | Extinct |
| Marti Ke | zmg | Living |
| Martu Wangka | mpj | Living |
| Martuyhunira | vma | Living |
| Maru | mhx | Living |
| Marúbo | mzr | Living |
| Marwari | mwr | Living |
| Marwari (India) | rwr | Living |
| Marwari (Pakistan) | mve | Living |
| Masaaba | myx | Living |
| Masadiit Itneg | tis | Living |
| Masai | mas | Living |
| Masalit | mls | Living |
| Masana | mcn | Living |
| Masbatenyo | msb | Living |
| Mashco Piro | cuj | Living |
| Mashi (Nigeria) | jms | Living |
| Mashi (Zambia) | mho | Living |
| Masikoro Malagasy | msh | Living |
| Masimasi | ism | Living |
| Masiwang | bnf | Living |
| Maskelynes | klv | Living |
| Maslam | msv | Living |
| Masmaje | mes | Living |
| Massalat | mdg | Living |
| Massep | mvs | Living |
| Matagalpa | mtn | Extinct |
| Matal | mfh | Living |
| Matbat | xmt | Living |
| Matengo | mgv | Living |
| Matepi | mqe | Living |
| Matigsalug Manobo | mbt | Living |
| Matipuhy | mzo | Extinct |
| Matís | mpq | Living |
| Mato | met | Living |
| Mato Grosso Arára | axg | Extinct |
| Mator | mtm | Extinct |
| Matsés | mcf | Living |
| Mattole | mvb | Extinct |
| Matu Chin | hlt | Living |
| Matukar | mjk | Living |
| Matumbi | mgw | Living |
| Matya Samo | stj | Living |
| Maung | mph | Living |
| Mauritian Sign Language | lsy | Living |
| Mauwake | mhl | Living |
| Mawa (Chad) | mcw | Living |
| Mawa (Nigeria) | wma | Extinct |
| Mawak | mjj | Living |
| Mawan | mcz | Living |
| Mawayana | mzx | Living |
| Mawchi | mke | Living |
| Mawes | mgk | Living |
| Maxakalí | mbl | Living |
| Maxi Gbe | mxl | Living |
| Ma'ya | slz | Living |
| Maya Samo | sym | Living |
| Mayaguduna | xmy | Living |
| Mayangna | yan | Living |
| Mayawali | yxa | Extinct |
| Mayeka | myc | Living |
| Mayi-Kulan | xyk | Extinct |
| Mayi-Thakurti | xyt | Extinct |
| Mayi-Yapi | xyj | Extinct |
| Mayo | mfy | Living |
| Mayogo | mdm | Living |
| Mayoyao Ifugao | ifu | Living |
| Mazagway | dkx | Living |
| Mazaltepec Zapotec | zpy | Living |
| Mazanderani | mzn | Living |
| Mazatlán Mazatec | vmz | Living |
| Mazatlán Mixe | mzl | Living |
| Mba | mfc | Living |
| Mbala | mdp | Living |
| Mbalanhu | lnb | Living |
| Mbandja | zmz | Living |
| Mbangala | mxg | Living |
| Mbangi | mgn | Living |
| Mbangwe | zmn | Living |
| Mbara (Australia) | mvl | Extinct |
| Mbara (Chad) | mpk | Living |
| Mbariman-Gudhinma | zmv | Extinct |
| Mbati | mdn | Living |
| Mbato | gwa | Living |
| Mbay | myb | Living |
| Mbe | mfo | Living |
| Mbe' | mtk | Living |
| Mbelime | mql | Living |
| Mbere | mdt | Living |
| Mbesa | zms | Living |
| Mbo (Cameroon) | mbo | Living |
| Mbo (Democratic Republic of Congo) | zmw | Living |
| Mboi | moi | Living |
| Mboko | mdu | Living |
| Mbole | mdq | Living |
| Mbonga | xmb | Living |
| Mbongno | bgu | Living |
| Mbosi | mdw | Living |
| Mbowe | mxo | Living |
| Mbre | mka | Living |
| Mbudum | xmd | Living |
| Mbugu | mhd | Living |
| Mbugwe | mgz | Living |
| Mbuko | mqb | Living |
| Mbukushu | mhw | Living |
| Mbula | mna | Living |
| Mbula-Bwazza | mbu | Living |
| Mbule | mlb | Living |
| Mbulungish | mbv | Living |
| Mbum | mdd | Living |
| Mbunda | mck | Living |
| Mbunga | mgy | Living |
| Mburku | bbt | Living |
| Mbwela | mfu | Living |
| Mbyá Guaraní | gun | Living |
| Medebur | mjm | Living |
| Media Lengua | mue | Living |
| Mediak | mwx | Living |
| Median | xme | Ancient |
| Mednyj Aleut | mud | Living |
| Medumba | byv | Living |
| Me'en | mym | Living |
| Mefele | mfj | Living |
| Megam | mef | Living |
| Megleno Romanian | ruq | Living |
| Mehek | nux | Living |
| Mehináku | mmh | Living |
| Mehri | gdq | Living |
| Mekeo | mek | Living |
| Mekmek | mvk | Living |
| Mekwei | msf | Living |
| Mele-Fila | mxe | Living |
| Melo | mfx | Living |
| Melpa | med | Living |
| Memoni | mby | Living |
| Mendalam Kayan | xkd | Living |
| Mendankwe-Nkwen | mfd | Living |
| Mende (Papua New Guinea) | sim | Living |
| Mende (Sierra Leone) | men | Living |
| Mengaka | xmg | Living |
| Mengen | mee | Living |
| Mengisa | mct | Living |
| Ménik | tnr | Living |
| Menka | mea | Living |
| Menominee | mez | Living |
| Mentawai | mwv | Living |
| Menya | mcr | Living |
| Meoswar | mvx | Living |
| Mer | mnu | Living |
| Meramera | mxm | Living |
| Merei | lmb | Living |
| Merey | meq | Living |
| Meriam | ulk | Living |
| Merlav | mrm | Living |
| Meroitic | xmr | Ancient |
| Meru | mer | Living |
| Merwari | wry | Living |
| Mesaka | iyo | Living |
| Mescalero-Chiricahua Apache | apm | Living |
| Mese | mci | Living |
| Meskwaki | sac | Living |
| Mesme | zim | Living |
| Mesmes | mys | Extinct |
| Mesopotamian Arabic | acm | Living |
| Mesqan | mvz | Living |
| Messapic | cms | Ancient |
| Meta' | mgo | Living |
| Metlatónoc Mixtec | mxv | Living |
| Mewari | mtr | Living |
| Mewati | wtm | Living |
| Mexican Sign Language | mfs | Living |
| Meyah | mej | Living |
| Mezontla Popoloca | pbe | Living |
| Mezquital Otomi | ote | Living |
| Mfinu | zmf | Living |
| Mfumte | nfu | Living |
| Mgbolizhia | gmz | Living |
| Miahuatlán Zapotec | zam | Living |
| Miami | mia | Living |
| Mian | mpt | Living |
| Miani | pla | Living |
| Michif | crg | Living |
| Michigamea | cmm | Extinct |
| Michoacán Mazahua | mmc | Living |
| Michoacán Nahuatl | ncl | Living |
| Mid Grand Valley Dani | dnt | Living |
| Middle Armenian | axm | Historic |
| Middle Breton | xbm | Historic |
| Middle Cornish | cnx | Historic |
| Middle Dutch (ca. 1050-1350) | dum | Historic |
| Middle English (1100-1500) | enm | Historic |
| Middle French (ca. 1400-1600) | frm | Historic |
| Middle High German (ca. 1050-1500) | gmh | Historic |
| Middle Hittite | htx | Ancient |
| Middle Irish (900-1200) | mga | Historic |
| Middle Korean (10th-16th cent.) | okm | Historic |
| Middle Low German | gml | Historic |
| Middle Mongolian | xng | Historic |
| Middle Newar | nwx | Historic |
| Middle Watut | mpl | Living |
| Middle Welsh | wlm | Historic |
| Midob | mei | Living |
| Mid-Southern Banda | bjo | Living |
| Migaama | mmy | Living |
| Migabac | mpp | Living |
| Migum | klm | Living |
| Miju-Mishmi | mxj | Living |
| Mikasuki | mik | Living |
| Mi'kmaq | mic | Living |
| Mili | ymh | Living |
| Miltu | mlj | Living |
| Miluk | iml | Extinct |
| Milyan | imy | Ancient |
| Min Bei Chinese | mnp | Living |
| Min Dong Chinese | cdo | Living |
| Min Nan Chinese | nan | Living |
| Min Zhong Chinese | czo | Living |
| Mina (Cameroon) | hna | Living |
| Mina (India) | myi | Living |
| Minaean | inm | Ancient |
| Minang | xrg | Extinct |
| Minangkabau | min | Living |
| Minanibai | mcv | Living |
| Minaveha | mvn | Living |
| Minderico | drc | Living |
| Mindiri | mpn | Living |
| Mingang Doso | mko | Living |
| Mingrelian | xmf | Living |
| Minica Huitoto | hto | Living |
| Minidien | wii | Living |
| Minjungbal | xjb | Extinct |
| Minkin | xxm | Extinct |
| Minoan | omn | Ancient |
| Minokok | mqq | Living |
| Minriq | mnq | Living |
| Mintil | mzt | Living |
| Minz Zhuang | zgm | Living |
| Miqie | yiq | Living |
| Mirandese | mwl | Living |
| Miraya Bikol | rbl | Living |
| Mirgan | zrg | Living |
| Miriti | mmv | Extinct |
| Miriwung | mep | Living |
| Miship | mjs | Living |
| Misima-Panaeati | mpx | Living |
| Mising | mrg | Living |
| Mískito | miq | Living |
| Mitla Zapotec | zaw | Living |
| Mitlatongo Mixtec | vmm | Living |
| Mittu | mwu | Extinct |
| Mituku | zmq | Living |
| Miu | mpo | Living |
| Miwa | vmi | Extinct |
| Mixed Great Andamanese | gac | Living |
| Mixtepec Mixtec | mix | Living |
| Mixtepec Zapotec | zpm | Living |
| Miya | mkf | Living |
| Miyako | mvi | Living |
| Miyobe | soy | Living |
| Mlabri | mra | Living |
| Mlahsö | lhs | Extinct |
| Mlap | kja | Living |
| Mlomp | mlo | Living |
| Mmaala | mmu | Living |
| Mmen | bfm | Living |
| Moabite | obm | Ancient |
| Moba | mfq | Living |
| Mobilian | mod | Extinct |
| Mobumrin Aizi | ahm | Living |
| Mobwa Karen | jkm | Living |
| Mócheno | mhn | Living |
| Mochi | old | Living |
| Mochica | omc | Extinct |
| Mocho | mhc | Living |
| Mocoví | moc | Living |
| Mo'da | gbn | Living |
| Modang | mxd | Living |
| Modern Greek (1453-) | ell | Living |
| Modole | mqo | Living |
| Moere | mvq | Living |
| Mofu-Gudur | mif | Living |
| Mogholi | mhj | Living |
| Mogofin | mfg | Living |
| Mogum | mou | Living |
| Mohave | mov | Living |
| Mohawk | moh | Living |
| Mohegan-Pequot | xpq | Extinct |
| Moi (Congo) | mow | Living |
| Moi (Indonesia) | mxn | Living |
| Moikodi | mkp | Living |
| Moingi | mwz | Living |
| Moji | ymi | Living |
| Mok | mqt | Living |
| Moken | mwt | Living |
| Mokerang | mft | Living |
| Mokilese | mkj | Living |
| Moklen | mkm | Living |
| Mokole | mkl | Living |
| Mokpwe | bri | Living |
| Moksela | vms | Extinct |
| Moksha | mdf | Living |
| Molale | mbe | Extinct |
| Molbog | pwm | Living |
| Moldova Sign Language | vsi | Living |
| Molengue | bxc | Living |
| Molima | mox | Living |
| Molmo One | aun | Living |
| Molo | zmo | Living |
| Molof | msl | Living |
| Moloko | mlw | Living |
| Mom Jango | ver | Living |
| Moma | myl | Living |
| Momare | msz | Living |
| Mombo Dogon | dmb | Living |
| Mombum | mso | Living |
| Momina | mmb | Living |
| Momuna | mqf | Living |
| Mon | mnw | Living |
| Monastic Sign Language | mzg | Living |
| Mondé | mnd | Living |
| Mondropolon | npn | Living |
| Mongo | lol | Living |
| Mongol | mgt | Living |
| Mongolia Buriat | bxm | Living |
| Mongolian | mon | Living |
| Mongolian Sign Language | msr | Living |
| Mongondow | mog | Living |
| Moni | mnz | Living |
| Mono (Cameroon) | mru | Living |
| Mono (Democratic Republic of Congo) | mnh | Living |
| Mono (Solomon Islands) | mte | Living |
| Mono (USA) | mnr | Living |
| Monom | moo | Living |
| Monsang Naga | nmh | Living |
| Montagnais | moe | Living |
| Montol | mtl | Living |
| Monumbo | mxk | Living |
| Monzombo | moj | Living |
| Moo | gwg | Living |
| Moose Cree | crm | Living |
| Mopán Maya | mop | Living |
| Mor (Bomberai Peninsula) | moq | Living |
| Mor (Mor Islands) | mhz | Living |
| Moraid | msg | Living |
| Morawa | mze | Living |
| Morelos Nahuatl | nhm | Living |
| Morerebi | xmo | Living |
| Moresada | msx | Living |
| Mori Atas | mzq | Living |
| Mori Bawah | xmz | Living |
| Morigi | mdb | Living |
| Morisyen | mfe | Living |
| Moro | mor | Living |
| Moroccan Arabic | ary | Living |
| Moroccan Sign Language | xms | Living |
| Morokodo | mgc | Living |
| Morom | bdo | Living |
| Moronene | mqn | Living |
| Morori | mok | Living |
| Morouas | mrp | Living |
| Mortlockese | mrl | Living |
| Moru | mgd | Living |
| Mosimo | mqv | Living |
| Mosiro | mwy | Living |
| Moskona | mtj | Living |
| Mossi | mos | Living |
| Mota | mtt | Living |
| Motlav | mlv | Living |
| Motu | meu | Living |
| Mouk-Aria | mwh | Living |
| Mountain Koiali | kpx | Living |
| Mouwase | jmw | Living |
| Movima | mzp | Living |
| Moyadan Itneg | ity | Living |
| Moyon Naga | nmo | Living |
| Mozambican Sign Language | mzy | Living |
| Mozarabic | mxi | Extinct |
| Mpade | mpi | Living |
| Mpalitjanh | xpj | Extinct |
| Mpi | mpz | Living |
| Mpiemo | mcx | Living |
| Mpoto | mpa | Living |
| Mpotovoro | mvt | Living |
| Mpumpong | mgg | Living |
| Mpuono | zmp | Living |
| Mpur | akc | Living |
| Mro-Khimi Chin | cmr | Living |
| Mru | mro | Living |
| Mser | kqx | Living |
| Mt. Iraya Agta | atl | Living |
| Mt. Iriga Agta | agz | Living |
| Mualang | mtd | Living |
| Mubami | tsx | Living |
| Mubi | mub | Living |
| Muda | ymd | Living |
| Mudburra | dmw | Living |
| Mudhili Gadaba | gau | Living |
| Mudu Koraga | vmd | Living |
| Muduga | udg | Living |
| Mufian | aoj | Living |
| Mugom | muk | Living |
| Muinane | bmr | Living |
| Mukha-Dora | mmk | Living |
| Mukulu | moz | Living |
| Mulaha | mfw | Extinct |
| Mulam | mlm | Living |
| Mulao | giu | Living |
| Mulgi | mvh | Living |
| Mullu Kurumba | kpb | Living |
| Mullukmulluk | mpb | Living |
| Muluridyi | vmu | Extinct |
| Mum | kqa | Living |
| Mumuye | mzm | Living |
| Mün Chin | mwq | Living |
| Muna | mnb | Living |
| Munda | unx | Living |
| Mundabli | boe | Living |
| Mundang | mua | Living |
| Mundani | mnf | Living |
| Mundari | unr | Living |
| Mundat | mmf | Living |
| Mündü | muh | Living |
| Mundurukú | myu | Living |
| Mungaka | mhk | Living |
| Munggui | mth | Living |
| Mungkip | mpv | Living |
| Muniche | myr | Living |
| Munit | mtc | Living |
| Munji | mnj | Living |
| Munsee | umu | Living |
| Muong | mtq | Living |
| Mur Pano | tkv | Living |
| Muratayak | asx | Living |
| Murik (Malaysia) | mxr | Living |
| Murik (Papua New Guinea) | mtf | Living |
| Murkim | rmh | Living |
| Murle | mur | Living |
| Murrinh-Patha | mwf | Living |
| Mursi | muz | Living |
| Murui Huitoto | huu | Living |
| Murupi | mqw | Living |
| Muruwari | zmu | Extinct |
| Musak | mmq | Living |
| Musar | mmi | Living |
| Musasa | smm | Living |
| Musey | mse | Living |
| Musgu | mug | Living |
| Mushungulu | xma | Living |
| Musi | mui | Living |
| Muskum | mje | Extinct |
| Muslim Tat | ttt | Living |
| Musom | msu | Living |
| Mussau-Emira | emi | Living |
| Muthuvan | muv | Living |
| Mutu | tuc | Living |
| Muya | mvm | Living |
| Muyang | muy | Living |
| Muyuw | myw | Living |
| Muzi | ymz | Living |
| Mvanip | mcj | Living |
| Mvuba | mxh | Living |
| Mwaghavul | sur | Living |
| Mwali Comorian | wlc | Living |
| Mwan | moa | Living |
| Mwani | wmw | Living |
| Mwatebu | mwa | Living |
| Mwera (Chimwera) | mwe | Living |
| Mwera (Nyasa) | mjh | Living |
| Mwimbi-Muthambi | mws | Living |
| Mycenaean Greek | gmy | Ancient |
| Myene | mye | Living |
| Mysian | yms | Ancient |
| Mzieme Naga | nme | Living |
| N/u | ngh | Living |
| Na | nbt | Living |
| Naaba | nao | Living |
| Naami | bzv | Living |
| Naasioi | nas | Living |
| Naba | mne | Living |
| Nabak | naf | Living |
| Nabi | mty | Living |
| Nachering | ncd | Living |
| Nadëb | mbj | Living |
| Nadruvian | ndf | Extinct |
| Nafaanra | nfr | Living |
| Nafi | srf | Living |
| Nafri | nxx | Living |
| Nafusi | jbn | Living |
| Naga Pidgin | nag | Living |
| Nagarchal | nbg | Living |
| Nage | nxe | Living |
| Nagumi | ngv | Extinct |
| Nahali | nlx | Living |
| Nahari | nhh | Living |
| Nai | bio | Living |
| Najdi Arabic | ars | Living |
| Naka'ela | nae | Living |
| Nakai | nkj | Living |
| Nakame | nib | Living |
| Nakanai | nak | Living |
| Nakara | nck | Living |
| Nake | nbk | Living |
| Naki | mff | Living |
| Nakwi | nax | Living |
| Nalca | nlc | Living |
| Nali | nss | Living |
| Nalik | nal | Living |
| Nalögo | nlz | Living |
| Nalu | naj | Living |
| Naluo Yi | ylo | Living |
| Nama (Papua New Guinea) | nmx | Living |
| Namakura | nmk | Living |
| Namat | nkm | Living |
| Nambo | ncm | Living |
| Nambya | nmq | Living |
| Ná-Meo | neo | Living |
| Namia | nnm | Living |
| Namiae | nvm | Living |
| Namibian Sign Language | nbs | Living |
| Namla | naa | Living |
| Namo | mxw | Living |
| Namonuito | nmt | Living |
| Namosi-Naitasiri-Serua | bwb | Living |
| Namuyi | nmy | Living |
| Nanai | gld | Living |
| Nancere | nnc | Living |
| Nande | nnb | Living |
| Nandi | niq | Living |
| Nanerigé Sénoufo | sen | Living |
| Nanga Dama Dogon | nzz | Living |
| Nankina | nnk | Living |
| Nanti | cox | Living |
| Nanticoke | nnt | Extinct |
| Nanubae | afk | Living |
| Napo Lowland Quechua | qvo | Living |
| Napu | npy | Living |
| Nar Phu | npa | Living |
| Nara | nrb | Living |
| Narak | nac | Living |
| Narango | nrg | Living |
| Narau | nxu | Extinct |
| Nari Nari | rnr | Extinct |
| Narim | loh | Living |
| Naro | nhr | Living |
| Narom | nrm | Living |
| Narragansett | xnt | Extinct |
| Narrinyeri | nay | Extinct |
| Narua | nru | Living |
| Narungga | nnr | Extinct |
| Nasal | nsy | Living |
| Nasarian | nvh | Living |
| Naskapi | nsk | Living |
| Natagaimas | nts | Extinct |
| Natanzi | ntz | Living |
| Nataoran Amis | ais | Living |
| Natchez | ncz | Extinct |
| Nateni | ntm | Living |
| Nathembo | nte | Living |
| Natioro | nti | Living |
| Natügu | ntu | Living |
| Nauete | nxa | Living |
| Naukan Yupik | ynk | Living |
| Nauna | ncn | Living |
| Nauo | nwo | Extinct |
| Nauru | nau | Living |
| Navajo | nav | Living |
| Navut | nsw | Living |
| Nawaru | nwr | Living |
| Nawathinehena | nwa | Extinct |
| Nawdm | nmz | Living |
| Nawuri | naw | Living |
| Naxi | nxq | Living |
| Nayi | noz | Living |
| Nayini | nyq | Living |
| Ncane | ncr | Living |
| Nchumbulu | nlu | Living |
| Ndai | gke | Living |
| Ndaka | ndk | Living |
| Ndaktup | ncp | Living |
| Ndali | ndh | Living |
| Ndam | ndm | Living |
| Ndamba | ndj | Living |
| Ndambomo | nxo | Living |
| Nda'nda' | nnz | Living |
| Ndasa | nda | Living |
| Ndau | ndc | Living |
| Nde-Gbite | ned | Living |
| Ndemli | nml | Living |
| Ndendeule | dne | Living |
| Ndengereko | ndg | Living |
| Nde-Nsele-Nta | ndd | Living |
| Nding | eli | Extinct |
| Ndo | ndp | Living |
| Ndobo | ndw | Living |
| Ndoe | nbb | Living |
| Ndogo | ndz | Living |
| Ndolo | ndl | Living |
| Ndom | nqm | Living |
| Ndombe | ndq | Living |
| Ndonde Hamba | njd | Living |
| Ndonga | ndo | Living |
| Ndoola | ndr | Living |
| Ndra'ngith | dgt | Extinct |
| Nduga | ndx | Living |
| Ndumu | nmd | Living |
| Ndunda | nuh | Living |
| Ndunga | ndt | Living |
| Ndut | ndv | Living |
| Ndyuka-Trio Pidgin | njt | Living |
| Ndzwani Comorian | wni | Living |
| Neapolitan | nap | Living |
| Nedebang | nec | Living |
| Nefamese | nef | Living |
| Negerhollands | dcr | Extinct |
| Negeri Sembilan Malay | zmi | Living |
| Negidal | neg | Living |
| Nehan | nsn | Living |
| Nek | nif | Living |
| Nekgini | nkg | Living |
| Neko | nej | Living |
| Neku | nek | Living |
| Nêlêmwa-Nixumwak | nee | Living |
| Neme | nex | Living |
| Nemi | nem | Living |
| Nen | nqn | Living |
| Nend | anh | Living |
| Nenets | yrk | Living |
| Nengone | nen | Living |
| Neo | neu | Constructed |
| Neo-Hittite | nei | Ancient |
| Nepalese Sign Language | nsp | Living |
| Nepali (individual language) | npi | Living |
| Nepali (macrolanguage) | nep | Living |
| Nepali Kurux | kxl | Living |
| Nete | net | Living |
| New Caledonian Javanese | jas | Living |
| New Zealand Sign Language | nzs | Living |
| Newari | new | Living |
| Neyo | ney | Living |
| Nez Perce | nez | Living |
| Ngaanyatjarra | ntj | Living |
| Ngäbere | gym | Living |
| Ngad'a | nxg | Living |
| Ngadjunmaya | nju | Living |
| Ngadjuri | jui | Extinct |
| Ngaing | nnf | Living |
| Ngaju | nij | Living |
| Ngala | nud | Living |
| Ngalakan | nig | Extinct |
| Ngalum | szb | Living |
| Ngam | nmc | Living |
| Ngamambo | nbv | Living |
| Ngambay | sba | Living |
| Ngamini | nmv | Extinct |
| Ngamo | nbh | Living |
| Nganakarti | xnk | Extinct |
| Nganasan | nio | Living |
| Ngandi | nid | Extinct |
| Ngando (Central African Republic) | ngd | Living |
| Ngando (Democratic Republic of Congo) | nxd | Living |
| Ngandyera | nne | Living |
| Ngangam | gng | Living |
| Ngan'gityemerri | nam | Living |
| Ngantangarra | ntg | Extinct |
| Nganyaywana | nyx | Extinct |
| Ngardi | rxd | Living |
| Ngarigu | xni | Extinct |
| Ngarinman | nbj | Living |
| Ngarinyin | ung | Living |
| Ngarla | nrk | Living |
| Ngarluma | nrl | Living |
| Ngas | anc | Living |
| Ngasa | nsg | Living |
| Ngatik Men's Creole | ngm | Living |
| Ngawn Chin | cnw | Living |
| Ngawun | nxn | Extinct |
| Ngayawung | nwg | Extinct |
| Ngazidja Comorian | zdj | Living |
| Ngbaka | nga | Living |
| Ngbaka Ma'bo | nbm | Living |
| Ngbaka Manza | ngg | Living |
| Ngbee | jgb | Extinct |
| Ngbinda | nbd | Living |
| Ngbundu | nuu | Living |
| Ngelima | agh | Living |
| Ngemba | nge | Living |
| Ngeq | ngt | Living |
| Ngete | nnn | Living |
| Nggem | nbq | Living |
| Nggwahyi | ngx | Living |
| Ngie | ngj | Living |
| Ngiemboon | nnh | Living |
| Ngile | jle | Living |
| Ngindo | nnq | Living |
| Ngiti | niy | Living |
| Ngizim | ngi | Living |
| Ngkâlmpw Kanum | kcd | Living |
| Ngom | nra | Living |
| Ngomba | jgo | Living |
| Ngombale | nla | Living |
| Ngombe (Central African Republic) | nmj | Living |
| Ngombe (Democratic Republic of Congo) | ngc | Living |
| Ngongo | noq | Living |
| Ngoni | ngo | Living |
| Ngoshie | nsh | Living |
| Ngul | nlo | Living |
| Ngulu | ngp | Living |
| Nguluwan | nuw | Living |
| Ngumbi | nui | Living |
| Ngunawal | xul | Extinct |
| Ngundi | ndn | Living |
| Ngundu | nue | Living |
| Ngungwel | ngz | Living |
| Nguôn | nuo | Living |
| Ngurimi | ngq | Living |
| Ngurmbur | nrx | Extinct |
| Ngwaba | ngw | Living |
| Ngwe | nwe | Living |
| Ngwo | ngn | Living |
| Nhanda | nha | Living |
| Nhengatu | yrl | Living |
| Nhirrpi | hrp | Extinct |
| Nhuwala | nhf | Living |
| Nias | nia | Living |
| Nicaragua Creole English | bzk | Living |
| Nicaraguan Sign Language | ncs | Living |
| Niellim | nie | Living |
| Nigeria Mambila | mzk | Living |
| Nigerian Fulfulde | fuv | Living |
| Nigerian Pidgin | pcm | Living |
| Nigerian Sign Language | nsi | Living |
| Nihali | nll | Living |
| Nii | nii | Living |
| Nijadali | nad | Living |
| Niksek | gbe | Living |
| Nila | nil | Living |
| Nilamba | nim | Living |
| Nimadi | noe | Living |
| Nimanbur | nmp | Extinct |
| Nimbari | nmr | Extinct |
| Nimboran | nir | Living |
| Nimi | nis | Living |
| Nimo | niw | Living |
| Nimoa | nmw | Living |
| Ninam | shb | Living |
| Nindi | nxi | Living |
| Ningera | nby | Living |
| Ninggerum | nxr | Living |
| Ningil | niz | Living |
| Ningye | nns | Living |
| Ninia Yali | nlk | Living |
| Ninzo | nin | Living |
| Nipsan | nps | Living |
| Nisa | njs | Living |
| Nisenan | nsz | Living |
| Nisga'a | ncg | Living |
| Nisi (China) | yso | Living |
| Niuafo'ou | num | Living |
| Niuatoputapu | nkp | Extinct |
| Niuean | niu | Living |
| Nivaclé | cag | Living |
| Niwer Mil | hrc | Living |
| Njalgulgule | njl | Living |
| Njebi | nzb | Living |
| Njen | njj | Living |
| Njerep | njr | Living |
| Njyem | njy | Living |
| Nkami | nkq | Living |
| Nkangala | nkn | Living |
| Nkari | nkz | Living |
| Nkem-Nkum | isi | Living |
| Nkhumbi | khu | Living |
| N'Ko | nqo | Living |
| Nkongho | nkc | Living |
| Nkonya | nko | Living |
| Nkoroo | nkx | Living |
| Nkoya | nka | Living |
| Nkukoli | nbo | Living |
| Nkutu | nkw | Living |
| Nnam | nbp | Living |
| Nobiin | fia | Living |
| Nobonob | gaw | Living |
| Nocamán | nom | Extinct |
| Nocte Naga | njb | Living |
| Nogai | nog | Living |
| Noiri | noi | Living |
| Nokuku | nkk | Living |
| Nomaande | lem | Living |
| Nomane | nof | Living |
| Nomatsiguenga | not | Living |
| Nomlaki | nol | Extinct |
| Nomu | noh | Living |
| Nong Zhuang | zhn | Living |
| Nonuya | noj | Living |
| Nooksack | nok | Extinct |
| Noon | snf | Living |
| Noone | nhu | Living |
| Nopala Chatino | cya | Living |
| Noric | nrc | Ancient |
| Norn | nrn | Extinct |
| Norra | nrr | Extinct |
| North Alaskan Inupiatun | esi | Living |
| North Ambrym | mmg | Living |
| North Asmat | nks | Living |
| North Awyu | yir | Living |
| North Azerbaijani | azj | Living |
| North Babar | bcd | Living |
| North Bolivian Quechua | qul | Living |
| North Central Mixe | neq | Living |
| North Efate | llp | Living |
| North Fali | fll | Living |
| North Giziga | gis | Living |
| North Junín Quechua | qvn | Living |
| North Levantine Arabic | apc | Living |
| North Marquesan | mrq | Living |
| North Mesopotamian Arabic | ayp | Living |
| North Mofu | mfk | Living |
| North Moluccan Malay | max | Living |
| North Muyu | kti | Living |
| North Ndebele | nde | Living |
| North Nuaulu | nni | Living |
| North Picene | nrp | Ancient |
| North Slavey | scs | Living |
| North Tairora | tbg | Living |
| North Tanna | tnn | Living |
| North Wahgi | whg | Living |
| North Watut | una | Living |
| Northeast Kiwai | kiw | Living |
| Northeast Maidu | nmu | Living |
| Northeast Pashai | aee | Living |
| Northeastern Dinka | dip | Living |
| Northeastern Pomo | pef | Extinct |
| Northeastern Thai | tts | Living |
| Northern Alta | aqn | Living |
| Northern Altai | atv | Living |
| Northern Amami-Oshima | ryn | Living |
| Northern Betsimisaraka Malagasy | bmm | Living |
| Northern Binukidnon | kyn | Living |
| Northern Bobo Madaré | bbo | Living |
| Northern Bontok | rbk | Living |
| Northern Catanduanes Bikol | cts | Living |
| Northern Conchucos Ancash Quechua | qxn | Living |
| Northern Dagara | dgi | Living |
| Northern Dong | doc | Living |
| Northern East Cree | crl | Living |
| Northern Emberá | emp | Living |
| Northern Frisian | frr | Living |
| Northern Ghale | ghh | Living |
| Northern Gondi | gno | Living |
| Northern Grebo | gbo | Living |
| Northern Guiyang Hmong | huj | Living |
| Northern Haida | hdn | Living |
| Northern Hindko | hno | Living |
| Northern Huishui Hmong | hmi | Living |
| Northern Kalapuya | nrt | Extinct |
| Northern Kankanay | xnn | Living |
| Northern Khmer | kxm | Living |
| Northern Kissi | kqs | Living |
| Northern Kurdish | kmr | Living |
| Northern Luri | lrc | Living |
| Northern Mashan Hmong | hmp | Living |
| Northern Muji | ymx | Living |
| Northern Nago | xkb | Living |
| Northern Ngbandi | ngb | Living |
| Northern Nisu | yiv | Living |
| Northern Nuni | nuv | Living |
| Northern Oaxaca Nahuatl | nhy | Living |
| Northern Ohlone | cst | Living |
| Northern One | onr | Living |
| Northern Paiute | pao | Living |
| Northern Pame | pmq | Living |
| Northern Pashto | pbu | Living |
| Northern Pastaza Quichua | qvz | Living |
| Northern Pomo | pej | Extinct |
| Northern Puebla Nahuatl | ncj | Living |
| Northern Pumi | pmi | Living |
| Northern Qiandong Miao | hea | Living |
| Northern Qiang | cng | Living |
| Northern Rengma Naga | nnl | Living |
| Northern Roglai | rog | Living |
| Northern Sami | sme | Living |
| Northern Sierra Miwok | nsq | Living |
| Northern Sorsoganon | bks | Living |
| Northern Subanen | stb | Living |
| Northern Tarahumara | thh | Living |
| Northern Tepehuan | ntp | Living |
| Northern Thai | nod | Living |
| Northern Tiwa | twf | Living |
| Northern Tlaxiaco Mixtec | xtn | Living |
| Northern Toussian | tsp | Living |
| Northern Tujia | tji | Living |
| Northern Tutchone | ttm | Living |
| Northern Uzbek | uzn | Living |
| Northern Yukaghir | ykg | Living |
| Northwest Alaska Inupiatun | esk | Living |
| Northwest Gbaya | gya | Living |
| Northwest Maidu | mjd | Living |
| Northwest Oaxaca Mixtec | mxa | Living |
| Northwest Pashai | glh | Living |
| Northwestern Dinka | diw | Living |
| Northwestern Fars | faz | Living |
| Northwestern Kolami | kfb | Living |
| Northwestern Nisu | nsf | Living |
| Northwestern Ojibwa | ojb | Living |
| Northwestern Tamang | tmk | Living |
| Norwegian | nor | Living |
| Norwegian Bokmål | nob | Living |
| Norwegian Nynorsk | nno | Living |
| Norwegian Sign Language | nsl | Living |
| Notre | bly | Living |
| Notsi | ncf | Living |
| Nottoway | ntw | Extinct |
| Nottoway-Meherrin | nwy | Extinct |
| Novial | nov | Constructed |
| Noy | noy | Living |
| Nsenga | nse | Living |
| Nshi | nsc | Living |
| Nsongo | nsx | Living |
| Ntcham | bud | Living |
| Ntomba | nto | Living |
| Nubaca | baf | Living |
| Nubi | kcn | Living |
| Nubri | kte | Living |
| Nuer | nus | Living |
| Nugunu (Australia) | nnv | Extinct |
| Nugunu (Cameroon) | yas | Living |
| Nuk | noc | Living |
| Nukak Makú | mbr | Living |
| Nukna | klt | Living |
| Nukuini | nuc | Extinct |
| Nukumanu | nuq | Living |
| Nukunul | xnu | Extinct |
| Nukuoro | nkr | Living |
| Nukuria | nur | Living |
| Numana-Nunku-Gbantu-Numbu | nbr | Living |
| Numanggang | nop | Living |
| Numbami | sij | Living |
| Nume | tgs | Living |
| Numèè | kdk | Living |
| Numidian | nxm | Ancient |
| Nung (Viet Nam) | nut | Living |
| Nungali | nug | Extinct |
| Nunggubuyu | nuy | Living |
| Nungu | rin | Living |
| Nupbikha | npb | Living |
| Nupe-Nupe-Tako | nup | Living |
| Nüpode Huitoto | hux | Living |
| Nusa Laut | nul | Living |
| Nusu | nuf | Living |
| Nuu-chah-nulth | nuk | Living |
| Nyabwa | nwb | Living |
| Nyaheun | nev | Living |
| Nyahkur | cbn | Living |
| Nyakyusa-Ngonde | nyy | Living |
| Nyâlayu | yly | Living |
| Nyali | nlj | Living |
| Nyam | nmi | Living |
| Nyamal | nly | Living |
| Nyambo | now | Living |
| Nyamusa-Molo | nwm | Living |
| Nyamwanga | mwn | Living |
| Nyamwezi | nym | Living |
| Nyaneka | nyk | Living |
| Nyanga | nyj | Living |
| Nyanga-li | nyc | Living |
| Nyangatom | nnj | Living |
| Nyangbo | nyb | Living |
| Nyangga | nny | Extinct |
| Nyang'i | nyp | Extinct |
| Nyangumarta | nna | Living |
| Nyanja | nya | Living |
| Nyankole | nyn | Living |
| Nyankpa | yes | Living |
| Nyarafolo Senoufo | sev | Living |
| Nyaturu | rim | Living |
| Nyaw | nyw | Living |
| Nyawaygi | nyt | Extinct |
| Nyemba | nba | Living |
| Nyengo | nye | Living |
| Nyenkha | neh | Living |
| Nyeu | nyl | Living |
| Nyigina | nyh | Living |
| Nyiha (Malawi) | nyr | Living |
| Nyiha (Tanzania) | nih | Living |
| Nyika (Malawi and Zambia) | nkv | Living |
| Nyika (Tanzania) | nkt | Living |
| Nyindrou | lid | Living |
| Nyindu | nyg | Living |
| Nyishi | njz | Living |
| Nyiyaparli | xny | Living |
| Nyokon | nvo | Living |
| Nyole | nuj | Living |
| Nyong | muo | Living |
| Nyore | nyd | Living |
| Nyoro | nyo | Living |
| Nyulnyul | nyv | Extinct |
| Nyunga | nys | Living |
| Nyungwe | nyu | Living |
| Nzakambay | nzy | Living |
| Nzakara | nzk | Living |
| Nzanyi | nja | Living |
| Nzima | nzi | Living |
| Obanliku | bzy | Living |
| Obispeño | obi | Extinct |
| Oblo | obl | Living |
| Obo Manobo | obo | Living |
| Obokuitai | afz | Living |
| Obolo | ann | Living |
| Obulom | obu | Living |
| Ocaina | oca | Living |
| Occitan (post 1500) | oci | Living |
| O'chi'chi' | xoc | Extinct |
| Ocotepec Mixtec | mie | Living |
| Ocotlán Zapotec | zac | Living |
| Od | odk | Living |
| Odiai | bhf | Living |
| Odoodee | kkc | Living |
| O'du | tyh | Living |
| Odual | odu | Living |
| Odut | oda | Living |
| Ofayé | opy | Living |
| Official Aramaic (700-300 BCE) | arc | Ancient |
| Ofo | ofo | Extinct |
| Ogbah | ogc | Living |
| Ogbia | ogb | Living |
| Ogbogolo | ogg | Living |
| Ogbronuagum | ogu | Living |
| Ogea | eri | Living |
| Oirata | oia | Living |
| Ojibwa | oji | Living |
| Ojitlán Chinantec | chj | Living |
| Okanagan | oka | Living |
| Okiek | oki | Living |
| Oki-No-Erabu | okn | Living |
| Okobo | okb | Living |
| Okodia | okd | Living |
| Oko-Eni-Osayen | oks | Living |
| Oko-Juwoi | okj | Extinct |
| Okolod | kqv | Living |
| Okpamheri | opa | Living |
| Okpe (Northwestern Edo) | okx | Living |
| Okpe (Southwestern Edo) | oke | Living |
| Oksapmin | opm | Living |
| Oku | oku | Living |
| Old Aramaic (up to 700 BCE) | oar | Ancient |
| Old Avar | oav | Historic |
| Old Breton | obt | Historic |
| Old Burmese | obr | Historic |
| Old Chinese | och | Ancient |
| Old Cornish | oco | Historic |
| Old Dutch | odt | Historic |
| Old English (ca. 450-1100) | ang | Historic |
| Old French (842-ca. 1400) | fro | Historic |
| Old Frisian | ofs | Historic |
| Old Georgian | oge | Historic |
| Old High German (ca. 750-1050) | goh | Historic |
| Old Hittite | oht | Ancient |
| Old Hungarian | ohu | Historic |
| Old Irish (to 900) | sga | Historic |
| Old Japanese | ojp | Historic |
| Old Kentish Sign Language | okl | Extinct |
| Old Korean (3rd-9th cent.) | oko | Historic |
| Old Lithuanian | olt | Historic |
| Old Manipuri | omp | Historic |
| Old Marathi | omr | Historic |
| Old Mon | omx | Historic |
| Old Norse | non | Historic |
| Old Nubian | onw | Historic |
| Old Ossetic | oos | Ancient |
| Old Persian (ca. 600-400 B.C.) | peo | Historic |
| Old Provençal (to 1500) | pro | Historic |
| Old Russian | orv | Historic |
| Old Saxon | osx | Historic |
| Old Spanish | osp | Historic |
| Old Tamil | oty | Ancient |
| Old Tibetan | otb | Historic |
| Old Turkish | otk | Historic |
| Old Uighur | oui | Historic |
| Old Welsh | owl | Historic |
| Olekha | ole | Living |
| Olkol | olk | Extinct |
| Olo | ong | Living |
| Oloma | olm | Living |
| Olrat | olr | Living |
| Olu'bo | lul | Living |
| Olulumo-Ikom | iko | Living |
| Oluta Popoluca | plo | Living |
| Omagua | omg | Living |
| Omaha-Ponca | oma | Living |
| Omani Arabic | acx | Living |
| Ombamba | mbm | Living |
| Ombo | oml | Living |
| Omejes | ome | Extinct |
| Ometepec Nahuatl | nht | Living |
| Omi | omi | Living |
| Ömie | aom | Living |
| Omok | omk | Extinct |
| Omotik | omt | Living |
| Omurano | omu | Extinct |
| Ona | ona | Living |
| Oneida | one | Living |
| Ong | oog | Living |
| Önge | oon | Living |
| Onin | oni | Living |
| Onin Based Pidgin | onx | Living |
| Onjob | onj | Living |
| Ono | ons | Living |
| Onobasulu | onn | Living |
| Onondaga | ono | Living |
| Ontenu | ont | Living |
| Ontong Java | ojv | Living |
| Oorlams | oor | Living |
| Opao | opo | Living |
| Opata | opt | Extinct |
| Opuuo | lgn | Living |
| Orang Kanaq | orn | Living |
| Orang Seletar | ors | Living |
| Oraon Sadri | sdr | Living |
| Orejón | ore | Living |
| Oring | org | Living |
| Oriya (individual language) | ory | Living |
| Oriya (macrolanguage) | ori | Living |
| Orizaba Nahuatl | nlv | Living |
| Orma | orc | Living |
| Ormu | orz | Living |
| Ormuri | oru | Living |
| Oro | orx | Living |
| Oro Win | orw | Living |
| Oroch | oac | Living |
| Oroha | ora | Living |
| Orok | oaa | Living |
| Orokaiva | okv | Living |
| Oroko | bdu | Living |
| Orokolo | oro | Living |
| Oromo | orm | Living |
| Oroqen | orh | Living |
| Orowe | bpk | Living |
| Oruma | orr | Living |
| Orya | ury | Living |
| Osage | osa | Living |
| Osatu | ost | Living |
| Oscan | osc | Ancient |
| Osing | osi | Living |
| Ososo | oso | Living |
| Ossetian | oss | Living |
| Ot Danum | otd | Living |
| Otank | uta | Living |
| Oti | oti | Extinct |
| Otoro | otr | Living |
| Ottawa | otw | Living |
| Ottoman Turkish (1500-1928) | ota | Historic |
| Otuho | lot | Living |
| Otuke | otu | Extinct |
| Ouma | oum | Extinct |
| Oune | oue | Living |
| Owa | stn | Living |
| Owenia | wsr | Living |
| Owiniga | owi | Living |
| Oy | oyb | Living |
| Oya'oya | oyy | Living |
| Oyda | oyd | Living |
| Ozolotepec Zapotec | zao | Living |
| Ozumacín Chinantec | chz | Living |
| Pa Di | pdi | Living |
| Pa'a | pqa | Living |
| Pááfang | pfa | Living |
| Paakantyi | drl | Living |
| Paama | pma | Living |
| Paasaal | sig | Living |
| Pacahuara | pcp | Living |
| Pacaraos Quechua | qvp | Living |
| Pacific Gulf Yupik | ems | Living |
| Pacoh | pac | Living |
| Padoe | pdo | Living |
| Paekche | pkc | Extinct |
| Paelignian | pgn | Ancient |
| Páez | pbb | Living |
| Pagi | pgi | Living |
| Pagibete | pae | Living |
| Pagu | pgu | Living |
| Pahanan Agta | apf | Living |
| Pahari-Potwari | phr | Living |
| Pahi | lgt | Living |
| Pahlavani | phv | Living |
| Pahlavi | pal | Ancient |
| Pa-Hng | pha | Living |
| Pai Tavytera | pta | Living |
| Paicî | pri | Living |
| Paipai | ppi | Living |
| Paite Chin | pck | Living |
| Paiwan | pwn | Living |
| Pakaásnovos | pav | Living |
| Pakanha | pkn | Living |
| Pakistan Sign Language | pks | Living |
| Pak-Tong | pkg | Living |
| Paku | pku | Living |
| Paku Karen | jkp | Living |
| Pal | abw | Living |
| Palaic | plq | Ancient |
| Palaka Senoufo | plr | Living |
| Palantla Chinantec | cpa | Living |
| Palauan | pau | Living |
| Paleni | pnl | Living |
| Palenquero | pln | Living |
| Pali | pli | Ancient |
| Palikúr | plu | Living |
| Paliyan | pcf | Living |
| Pallanganmiddang | pmd | Extinct |
| Palor | fap | Living |
| Palpa | plp | Living |
| Paluan | plz | Living |
| Palu'e | ple | Living |
| Palumata | pmc | Extinct |
| Palya Bareli | bpx | Living |
| Pam | pmn | Living |
| Pambia | pmb | Living |
| Pamlico | pmk | Extinct |
| Pamona | pmf | Living |
| Pamosu | hih | Living |
| Pampanga | pam | Living |
| Pamplona Atta | att | Living |
| Pana (Burkina Faso) | pnq | Living |
| Pana (Central African Republic) | pnz | Living |
| Panamanian Sign Language | lsp | Living |
| Panamint | par | Living |
| Panao Huánuco Quechua | qxh | Living |
| Panará | kre | Living |
| Panasuan | psn | Living |
| Panawa | pwb | Living |
| Pancana | pnp | Living |
| Panchpargania | tdb | Living |
| Pande | bkj | Living |
| Pangasinan | pag | Living |
| Pangseng | pgs | Living |
| Pangutaran Sama | slm | Living |
| Pangwa | pbr | Living |
| Pangwali | pgg | Living |
| Panim | pnr | Living |
| Paniya | pcg | Living |
| Panjabi | pan | Living |
| Pankararé | pax | Extinct |
| Pankararú | paz | Extinct |
| Pankhu | pkh | Living |
| Pannei | pnc | Living |
| Pano | mqz | Living |
| Panoan Katukína | knt | Living |
| Panobo | pno | Extinct |
| Panyi Bai | bfc | Living |
| Panytyima | pnw | Living |
| Pao | ppa | Living |
| Pa'o Karen | blk | Living |
| Papantla Totonac | top | Living |
| Papapana | ppn | Living |
| Papar | dpp | Living |
| Papasena | pas | Living |
| Papel | pbo | Living |
| Papi | ppe | Living |
| Papiamento | pap | Living |
| Papitalai | pat | Living |
| Papora | ppu | Extinct |
| Papuan Malay | pmy | Living |
| Papuma | ppm | Living |
| Pará Arára | aap | Living |
| Pará Gavião | gvp | Living |
| Para Naga | pzn | Living |
| Parachi | prc | Living |
| Paraguayan Guaraní | gug | Living |
| Paraguayan Sign Language | pys | Living |
| Parakanã | pak | Living |
| Paranan | prf | Living |
| Paranawát | paf | Extinct |
| Paraujano | pbg | Extinct |
| Parauk | prk | Living |
| Parawen | prw | Living |
| Pardhan | pch | Living |
| Pardhi | pcl | Living |
| Pare | ppt | Living |
| Parecís | pab | Living |
| Parenga | pcj | Living |
| Päri | lkr | Living |
| Parkari Koli | kvx | Living |
| Parkwa | pbi | Living |
| Parsi | prp | Living |
| Parsi-Dari | prd | Living |
| Parthian | xpr | Ancient |
| Parya | paq | Living |
| Pasi | psq | Living |
| Pass Valley Yali | yac | Living |
| Patamona | pbc | Living |
| Patani | ptn | Living |
| Pataxó Hã-Ha-Hãe | pth | Extinct |
| Patep | ptp | Living |
| Pathiya | pty | Living |
| Patpatar | gfk | Living |
| Pattani | lae | Living |
| Pattani Malay | mfa | Living |
| Pattapu | ptq | Living |
| Patwin | pwi | Extinct |
| Paulohi | plh | Living |
| Paumarí | pad | Living |
| Paunaka | pnk | Living |
| Pauri Bareli | bfb | Living |
| Pauserna | psm | Extinct |
| Pawaia | pwa | Living |
| Pawnee | paw | Living |
| Paynamar | pmr | Living |
| Pe | pai | Living |
| Pear | pcb | Living |
| Pech | pay | Living |
| Pecheneg | xpc | Extinct |
| Pedi | nso | Living |
| Peere | pfe | Living |
| Pei | ppq | Living |
| Pekal | pel | Living |
| Pela | bxd | Living |
| Pele-Ata | ata | Living |
| Pelende | ppp | Living |
| Pemon | aoc | Living |
| Pémono | pev | Living |
| Penang Sign Language | psg | Living |
| Penchal | pek | Living |
| Pendau | ums | Living |
| Pengo | peg | Living |
| Pennsylvania German | pdc | Living |
| Peñoles Mixtec | mil | Living |
| Penrhyn | pnh | Living |
| Pentlatch | ptw | Extinct |
| Perai | wet | Living |
| Peranakan Indonesian | pea | Living |
| Peripheral Mongolian | mvf | Living |
| Pero | pip | Living |
| Persian | fas | Living |
| Persian Sign Language | psc | Living |
| Peruvian Sign Language | prl | Living |
| Petapa Zapotec | zpe | Living |
| Petats | pex | Living |
| Petjo | pey | Living |
| Pévé | lme | Living |
| Pfaelzisch | pfl | Living |
| Phai | prt | Living |
| Phake | phk | Living |
| Phala | ypa | Living |
| Phalura | phl | Living |
| Phana' | phq | Living |
| Phangduwali | phw | Living |
| Phende | pem | Living |
| Philippine Sign Language | psp | Living |
| Phimbi | phm | Living |
| Phoenician | phn | Ancient |
| Phola | ypg | Living |
| Pholo | yip | Living |
| Phom Naga | nph | Living |
| Phong-Kniang | pnx | Living |
| Phrae Pwo Karen | kjt | Living |
| Phrygian | xpg | Ancient |
| Phu Thai | pht | Living |
| Phuan | phu | Living |
| Phudagi | phd | Living |
| Phuie | pug | Living |
| Phukha | phh | Living |
| Phuma | ypm | Living |
| Phunoi | pho | Living |
| Phuong | phg | Living |
| Phupa | ypp | Living |
| Phupha | yph | Living |
| Phuza | ypz | Living |
| Piamatsina | ptr | Living |
| Piame | pin | Living |
| Piapoco | pio | Living |
| Piaroa | pid | Living |
| Picard | pcd | Living |
| Pichis Ashéninka | cpu | Living |
| Pictish | xpi | Extinct |
| Pidgin Delaware | dep | Extinct |
| Piemontese | pms | Living |
| Pijao | pij | Extinct |
| Pije | piz | Living |
| Pijin | pis | Living |
| Pilagá | plg | Living |
| Pileni | piv | Living |
| Pima Bajo | pia | Living |
| Pimbwe | piw | Living |
| Pinai-Hagahai | pnn | Living |
| Pingelapese | pif | Living |
| Pini | pii | Living |
| Pinigura | pnv | Living |
| Pinjarup | pnj | Extinct |
| Pinji | pic | Living |
| Pinotepa Nacional Mixtec | mio | Living |
| Pintiini | pti | Living |
| Pintupi-Luritja | piu | Living |
| Pinyin | pny | Living |
| Pipil | ppl | Living |
| Pirahã | myp | Living |
| Piratapuyo | pir | Living |
| Pirlatapa | bxi | Extinct |
| Piro | pie | Extinct |
| Pirriya | xpa | Extinct |
| Pisabo | pig | Living |
| Pisaflores Tepehua | tpp | Living |
| Piscataway | psy | Extinct |
| Pisidian | xps | Extinct |
| Pitcairn-Norfolk | pih | Living |
| Pite Sami | sje | Living |
| Piti | pcn | Living |
| Pitjantjatjara | pjt | Living |
| Pitta Pitta | pit | Extinct |
| Piu | pix | Living |
| Piya-Kwonci | piy | Living |
| Plains Cree | crk | Living |
| Plains Indian Sign Language | psd | Living |
| Plains Miwok | pmw | Living |
| Plapo Krumen | ktj | Living |
| Plateau Malagasy | plt | Living |
| Plautdietsch | pdt | Living |
| Playero | gob | Living |
| Pnar | pbv | Living |
| Pochuri Naga | npo | Living |
| Pochutec | xpo | Extinct |
| Podena | pdn | Living |
| Pogolo | poy | Living |
| Pohnpeian | pon | Living |
| Pokangá | pok | Living |
| Poke | pof | Living |
| Pokomo | pkb | Living |
| Pökoot | pko | Living |
| Polabian | pox | Extinct |
| Polari | pld | Living |
| Polci | plj | Living |
| Polish | pol | Living |
| Polish Sign Language | pso | Living |
| Polonombauk | plb | Living |
| Pom | pmo | Living |
| Pomo | pmm | Living |
| Ponam | ncc | Living |
| Ponares | pod | Extinct |
| Pongu | png | Living |
| Ponosakan | pns | Living |
| Pontic | pnt | Living |
| Ponyo-Gongwang Naga | npg | Living |
| Popti' | jac | Living |
| Poqomam | poc | Living |
| Poqomchi' | poh | Living |
| Porohanon | prh | Living |
| Port Sandwich | psw | Living |
| Port Vato | ptv | Living |
| Portuguese | por | Living |
| Portuguese Sign Language | psr | Living |
| Potawatomi | pot | Living |
| Potiguára | pog | Extinct |
| Pottangi Ollar Gadaba | gdb | Living |
| Poumei Naga | pmx | Living |
| Pouye | bye | Living |
| Powari | pwr | Living |
| Powhatan | pim | Extinct |
| Poyanáwa | pyn | Living |
| Prasuni | prn | Living |
| Pray 3 | pry | Living |
| Primitive Irish | pgl | Ancient |
| Principense | pre | Living |
| Providencia Sign Language | prz | Living |
| Prussian | prg | Living |
| Psikye | kvj | Living |
| Pu Ko | puk | Living |
| Puare | pux | Living |
| Pudtol Atta | atp | Living |
| Puelche | pue | Extinct |
| Puerto Rican Sign Language | psl | Living |
| Puimei Naga | npu | Living |
| Puinave | pui | Living |
| Pukapuka | pkp | Living |
| Pulaar | fuc | Living |
| Pulabu | pup | Living |
| Pular | fuf | Living |
| Puluwatese | puw | Living |
| Puma | pum | Living |
| Pumé | yae | Living |
| Pumpokol | xpm | Extinct |
| Punan Aput | pud | Living |
| Punan Bah-Biau | pna | Living |
| Punan Batu 1 | pnm | Living |
| Punan Merah | puf | Living |
| Punan Merap | puc | Living |
| Punan Tubu | puj | Living |
| Punic | xpu | Ancient |
| Puno Quechua | qxp | Living |
| Punthamara | xpt | Extinct |
| Punu | puu | Living |
| Puoc | puo | Living |
| Puquina | puq | Extinct |
| Puragi | pru | Living |
| Purari | iar | Living |
| Purepecha | tsz | Living |
| Puri | prr | Extinct |
| Purik | prx | Living |
| Purisimeño | puy | Extinct |
| Puroik | suv | Living |
| Puruborá | pur | Living |
| Purum | pub | Living |
| Pushto | pus | Living |
| Putai | mfl | Living |
| Putoh | put | Living |
| Putukwam | afe | Living |
| Pu-Xian Chinese | cpx | Living |
| Puyo | xpy | Extinct |
| Puyo-Paekche | xpp | Extinct |
| Puyuma | pyu | Living |
| Pwaamei | pme | Living |
| Pwapwâ | pop | Living |
| Pwo Eastern Karen | kjp | Living |
| Pwo Northern Karen | pww | Living |
| Pwo Western Karen | pwo | Living |
| Pyapun | pcw | Living |
| Pye Krumen | pye | Living |
| Pyen | pyy | Living |
| Pyu (Myanmar) | pyx | Ancient |
| Pyu (Papua New Guinea) | pby | Living |
| Qabiao | laq | Living |
| Q'anjob'al | kjb | Living |
| Qaqet | byx | Living |
| Qashqa'i | qxq | Living |
| Qatabanian | xqt | Ancient |
| Qau | gqu | Living |
| Qawasqar | alc | Living |
| Qila Muji | ymq | Living |
| Qimant | ahg | Living |
| Qiubei Zhuang | zqe | Living |
| Quapaw | qua | Living |
| Quebec Sign Language | fcs | Living |
| Quechan | yum | Living |
| Quechua | que | Living |
| Quenya | qya | Constructed |
| Querétaro Otomi | otq | Living |
| Quetzaltepec Mixe | pxm | Living |
| Queyu | qvy | Living |
| Quiavicuzas Zapotec | zpj | Living |
| Quileute | qui | Living |
| Quinault | qun | Extinct |
| Quinqui | quq | Living |
| Quioquitani-Quierí Zapotec | ztq | Living |
| Quiotepec Chinantec | chq | Living |
| Quiripi | qyp | Extinct |
| Rabha | rah | Living |
| Rade | rad | Living |
| Raetic | xrr | Ancient |
| Rahambuu | raz | Living |
| Rajah Kabunsuwan Manobo | mqk | Living |
| Rajasthani | raj | Living |
| Rajbanshi | rjs | Living |
| Raji | rji | Living |
| Rajong | rjg | Living |
| Rajput Garasia | gra | Living |
| Rakahanga-Manihiki | rkh | Living |
| Rakhine | rki | Living |
| Ralte | ral | Living |
| Rama | rma | Living |
| Ramoaaina | rai | Living |
| Ramopa | kjx | Living |
| Rampi | lje | Living |
| Rana Tharu | thr | Living |
| Rang | rax | Living |
| Rangkas | rgk | Extinct |
| Ranglong | rnl | Living |
| Rangpuri | rkt | Living |
| Rao | rao | Living |
| Rapa | ray | Living |
| Rapanui | rap | Living |
| Rapoisi | kyx | Living |
| Rapting | rpt | Living |
| Rara Bakati' | lra | Living |
| Rarotongan | rar | Living |
| Rasawa | rac | Living |
| Ratagnon | btn | Living |
| Ratahan | rth | Living |
| Rathawi | rtw | Living |
| Rathwi Bareli | bgd | Living |
| Raute | rau | Living |
| Ravula | yea | Living |
| Rawa | rwo | Living |
| Rawang | raw | Living |
| Rawat | jnl | Living |
| Rawngtu Chin | weu | Living |
| Rawo | rwa | Living |
| Rayón Zoque | zor | Living |
| Razajerdi | rat | Living |
| Red Gelao | gir | Living |
| Reel | atu | Living |
| Rejang | rej | Living |
| Rejang Kayan | ree | Living |
| Reli | rei | Living |
| Rema | bow | Extinct |
| Rembarunga | rmb | Living |
| Rembong | reb | Living |
| Remo | rem | Extinct |
| Remontado Dumagat | agv | Living |
| Rempi | rmp | Living |
| Remun | lkj | Living |
| Rendille | rel | Living |
| Rengao | ren | Living |
| Rennell-Bellona | mnv | Living |
| Rennellese Sign Language | rsi | Living |
| Repanbitip | rpn | Living |
| Rer Bare | rer | Extinct |
| Rerau | rea | Living |
| Rerep | pgk | Living |
| Reshe | res | Living |
| Resígaro | rgr | Living |
| Retta | ret | Living |
| Réunion Creole French | rcf | Living |
| Reyesano | rey | Living |
| Riang (India) | ria | Living |
| Riang (Myanmar) | ril | Living |
| Riantana | ran | Living |
| Ribun | rir | Living |
| Rien | rie | Living |
| Rikbaktsa | rkb | Living |
| Rincón Zapotec | zar | Living |
| Rinconada Bikol | bto | Living |
| Ringgou | rgu | Living |
| Ririo | rri | Living |
| Ritarungo | rit | Living |
| Riung | riu | Living |
| Riverain Sango | snj | Living |
| Rogo | rod | Living |
| Rohingya | rhg | Living |
| Roma | rmm | Living |
| Romagnol | rgn | Living |
| Romam | rmx | Living |
| Romanian | ron | Living |
| Romanian Sign Language | rms | Living |
| Romano-Greek | rge | Living |
| Romano-Serbian | rsb | Living |
| Romanova | rmv | Constructed |
| Romansh | roh | Living |
| Romany | rom | Living |
| Romblomanon | rol | Living |
| Rombo | rof | Living |
| Romkun | rmk | Living |
| Ron | cla | Living |
| Ronga | rng | Living |
| Rongga | ror | Living |
| Rongmei Naga | nbu | Living |
| Rongpo | rnp | Living |
| Ronji | roe | Living |
| Roon | rnn | Living |
| Roria | rga | Living |
| Rotokas | roo | Living |
| Rotuman | rtm | Living |
| Roviana | rug | Living |
| Ruching Palaung | pce | Living |
| Rudbari | rdb | Living |
| Rufiji | rui | Living |
| Ruga | ruh | Living |
| Rukai | dru | Living |
| Ruma | ruz | Living |
| Rumai Palaung | rbb | Living |
| Rumu | klq | Living |
| Runa | rna | Extinct |
| Rundi | run | Living |
| Runga | rou | Living |
| Rungtu Chin | rtc | Living |
| Rungus | drg | Living |
| Rungwa | rnw | Living |
| Russia Buriat | bxr | Living |
| Russian | rus | Living |
| Russian Sign Language | rsl | Living |
| Rusyn | rue | Living |
| Rutul | rut | Living |
| Ruuli | ruc | Living |
| Ruund | rnd | Living |
| Rwa | rwk | Living |
| Sa | sax | Living |
| Sa'a | apb | Living |
| Saafi-Saafi | sav | Living |
| Saam | raq | Living |
| Saamia | lsm | Living |
| Saaroa | sxr | Living |
| Saba | saa | Living |
| Sabaean | xsa | Ancient |
| Sabah Bisaya | bsy | Living |
| Sabah Malay | msi | Living |
| Sa'ban | snv | Living |
| Sabanê | sae | Living |
| Sabaot | spy | Living |
| Sabine | sbv | Ancient |
| Sabu | hvn | Living |
| Sabüm | sbo | Living |
| Sacapulteco | quv | Living |
| Sadri | sck | Living |
| Saek | skb | Living |
| Saep | spd | Living |
| Safaliba | saf | Living |
| Safeyoka | apz | Living |
| Safwa | sbk | Living |
| Sagala | sbm | Living |
| Sagalla | tga | Living |
| Saho | ssy | Living |
| Sahu | saj | Living |
| Saidi Arabic | aec | Living |
| Saint Lucian Creole French | acf | Living |
| Saisiyat | xsy | Living |
| Sajalong | sjl | Living |
| Sajau Basap | sjb | Living |
| Sakachep | sch | Living |
| Sakalava Malagasy | skg | Living |
| Sakao | sku | Living |
| Sakata | skt | Living |
| Sake | sak | Living |
| Sakirabiá | skf | Living |
| Sala | shq | Living |
| Salampasu | slx | Living |
| Salar | slr | Living |
| Salas | sgu | Living |
| Salasaca Highland Quichua | qxl | Living |
| Salchuq | slq | Living |
| Saleman | sau | Living |
| Saliba | sbe | Living |
| Sáliba | slc | Living |
| Salinan | sln | Extinct |
| Sallands | sdz | Living |
| Salt-Yui | sll | Living |
| Saluan | loe | Living |
| Salumá | slj | Living |
| Salvadoran Sign Language | esn | Living |
| Sam | snx | Living |
| Sama | smd | Living |
| Samaritan | smp | Extinct |
| Samaritan Aramaic | sam | Extinct |
| Samarokena | tmj | Living |
| Samatao | ysd | Living |
| Samay | syx | Living |
| Samba | smx | Living |
| Samba Daka | ccg | Living |
| Samba Leko | ndi | Living |
| Sambal | xsb | Living |
| Sambalpuri | spv | Living |
| Sambe | xab | Living |
| Samberigi | ssx | Living |
| Samburu | saq | Living |
| Samei | smh | Living |
| Samo | smq | Living |
| Samoan | smo | Living |
| Samogitian | sgs | Living |
| Samosa | swm | Living |
| Sampang | rav | Living |
| Samre | sxm | Living |
| Samtao | stu | Living |
| Samvedi | smv | Living |
| San Agustín Mixtepec Zapotec | ztm | Living |
| San Baltazar Loxicha Zapotec | zpx | Living |
| San Blas Kuna | cuk | Living |
| San Dionisio Del Mar Huave | hve | Living |
| San Felipe Otlaltepec Popoloca | pow | Living |
| San Francisco Del Mar Huave | hue | Living |
| San Francisco Matlatzinca | mat | Living |
| San Jerónimo Tecóatl Mazatec | maa | Living |
| San Juan Atzingo Popoloca | poe | Living |
| San Juan Colorado Mixtec | mjc | Living |
| San Juan Guelavía Zapotec | zab | Living |
| San Juan Teita Mixtec | xtj | Living |
| San Luís Temalacayuca Popoloca | pps | Living |
| San Marcos Tlacoyalco Popoloca | pls | Living |
| San Martín Itunyoso Triqui | trq | Living |
| San Martín Quechua | qvs | Living |
| San Mateo Del Mar Huave | huv | Living |
| San Miguel Creole French | scf | Living |
| San Miguel El Grande Mixtec | mig | Living |
| San Miguel Piedras Mixtec | xtp | Living |
| San Pedro Amuzgos Amuzgo | azg | Living |
| San Pedro Quiatoni Zapotec | zpf | Living |
| San Salvador Kongo | kwy | Living |
| San Vicente Coatlán Zapotec | zpt | Living |
| Sanaani Arabic | ayn | Living |
| Sanapaná | spn | Living |
| Sandawe | sad | Living |
| Sanga (Democratic Republic of Congo) | sng | Living |
| Sanga (Nigeria) | xsn | Living |
| Sanggau | scg | Living |
| Sangil | snl | Living |
| Sangir | sxn | Living |
| Sangisari | sgr | Living |
| Sangkong | sgk | Living |
| Sanglechi | sgy | Living |
| Sango | sag | Living |
| Sangtam Naga | nsa | Living |
| Sangu (Gabon) | snq | Living |
| Sangu (Tanzania) | sbp | Living |
| Sani | ysn | Living |
| Sanie | ysy | Living |
| Saniyo-Hiyewe | sny | Living |
| Sankaran Maninka | msc | Living |
| Sansi | ssi | Living |
| Sanskrit | san | Ancient |
| Santa Ana de Tusi Pasco Quechua | qxt | Living |
| Santa Catarina Albarradas Zapotec | ztn | Living |
| Santa Inés Ahuatempan Popoloca | pca | Living |
| Santa Inés Yatzechi Zapotec | zpn | Living |
| Santa Lucía Monteverde Mixtec | mdv | Living |
| Santa María Del Mar Huave | hvv | Living |
| Santa María La Alta Nahuatl | nhz | Living |
| Santa María Quiegolani Zapotec | zpi | Living |
| Santa María Zacatepec Mixtec | mza | Living |
| Santa Teresa Cora | cok | Living |
| Santali | sat | Living |
| Santiago del Estero Quichua | qus | Living |
| Santiago Xanica Zapotec | zpr | Living |
| Santo Domingo Albarradas Zapotec | zas | Living |
| Sanumá | xsu | Living |
| São Paulo Kaingáng | zkp | Extinct |
| Sa'och | scq | Living |
| Sãotomense | cri | Living |
| Saparua | spr | Living |
| Sapé | spc | Living |
| Sapo | krn | Living |
| Saponi | spi | Living |
| Saposa | sps | Living |
| Sapuan | spu | Living |
| Sar | mwm | Living |
| Sara | sre | Living |
| Sara Kaba | sbz | Living |
| Sara Kaba Deme | kwg | Living |
| Sara Kaba Náà | kwv | Living |
| Saraiki | skr | Living |
| Saramaccan | srm | Living |
| Sarangani Blaan | bps | Living |
| Sarangani Manobo | mbs | Living |
| Sarasira | zsa | Living |
| Saraveca | sar | Extinct |
| Sardinian | srd | Living |
| Sari | asj | Living |
| Sarikoli | srh | Living |
| Sarli | sdf | Living |
| Sarsi | srs | Living |
| Sartang | onp | Living |
| Sarua | swy | Living |
| Sarudu | sdu | Living |
| Saruga | sra | Living |
| Sasak | sas | Living |
| Sasaru | sxs | Living |
| Sassarese Sardinian | sdc | Living |
| Satawalese | stw | Living |
| Sateré-Mawé | mav | Living |
| Saterfriesisch | stq | Living |
| Saudi Arabian Sign Language | sdl | Living |
| Sauraseni Prakrit | psu | Historic |
| Saurashtra | saz | Living |
| Sauri | srt | Living |
| Sauria Paharia | mjt | Living |
| Sause | sao | Living |
| Sausi | ssj | Living |
| Savara | svr | Living |
| Savi | sdg | Living |
| Savosavo | svs | Living |
| Sawai | szw | Living |
| Saweru | swr | Living |
| Sawi | saw | Living |
| Sawila | swt | Living |
| Sawknah | swn | Living |
| Saxwe Gbe | sxw | Living |
| Saya | say | Living |
| Sayula Popoluca | pos | Living |
| Scots | sco | Living |
| Scottish Gaelic | gla | Living |
| Scythian | xsc | Ancient |
| Sea Island Creole English | gul | Living |
| Seba | kdg | Living |
| Sebat Bet Gurage | sgw | Living |
| Seberuang | sbx | Living |
| Sebop | sib | Living |
| Sebuyau | snb | Living |
| Sechelt | sec | Living |
| Secoya | sey | Living |
| Sedang | sed | Living |
| Sedoa | tvw | Living |
| Seeku | sos | Living |
| Segai | sge | Living |
| Segeju | seg | Living |
| Seget | sbg | Living |
| Sehwi | sfw | Living |
| Seimat | ssg | Living |
| Seit-Kaitetu | hik | Living |
| Sekani | sek | Living |
| Sekapan | skp | Living |
| Sekar | skz | Living |
| Seke (Nepal) | skj | Living |
| Seke (Vanuatu) | ske | Living |
| Sekele | vaj | Living |
| Seki | syi | Living |
| Seko Padang | skx | Living |
| Seko Tengah | sko | Living |
| Sekpele | lip | Living |
| Selangor Sign Language | kgi | Living |
| Selaru | slu | Living |
| Selayar | sly | Living |
| Selee | snw | Living |
| Selepet | spl | Living |
| Selian | sxl | Extinct |
| Selkup | sel | Living |
| Selungai Murut | slg | Living |
| Seluwasan | sws | Living |
| Semai | sea | Living |
| Semandang | sdm | Living |
| Semaq Beri | szc | Living |
| Sembakung Murut | sbr | Living |
| Semelai | sza | Living |
| Semimi | etz | Living |
| Semnam | ssm | Living |
| Semnani | smy | Living |
| Sempan | xse | Living |
| Sena | seh | Living |
| Senara Sénoufo | seq | Living |
| Senaya | syn | Living |
| Sene | sej | Living |
| Seneca | see | Living |
| Sened | sds | Extinct |
| Sengele | szg | Living |
| Senggi | snu | Living |
| Sengo | spk | Living |
| Sengseng | ssz | Living |
| Senhaja De Srair | sjs | Extinct |
| Sensi | sni | Extinct |
| Sentani | set | Living |
| Senthang Chin | sez | Living |
| Sentinel | std | Living |
| Sepa (Indonesia) | spb | Living |
| Sepa (Papua New Guinea) | spe | Living |
| Sepik Iwam | iws | Living |
| Sera | sry | Living |
| Serbian | srp | Living |
| Serbo-Croatian | hbs | Living |
| Sere | swf | Living |
| Serer | srr | Living |
| Seri | sei | Living |
| Serili | sve | Living |
| Seroa | kqu | Extinct |
| Serrano | ser | Living |
| Seru | szd | Extinct |
| Serua | srw | Living |
| Serudung Murut | srk | Living |
| Serui-Laut | seu | Living |
| Seselwa Creole French | crs | Living |
| Seta | stf | Living |
| Setaman | stm | Living |
| Seti | sbi | Living |
| Settla | sta | Living |
| Severn Ojibwa | ojs | Living |
| Sewa Bay | sew | Living |
| Seze | sze | Living |
| S'gaw Karen | ksw | Living |
| Sha | scw | Living |
| Shabak | sdb | Living |
| Shahmirzadi | srz | Living |
| Shahrudi | shm | Living |
| Shall-Zwall | sha | Living |
| Shamang | xsh | Living |
| Shama-Sambuga | sqa | Living |
| Shambala | ksb | Living |
| Shan | shn | Living |
| Shanenawa | swo | Living |
| Shanga | sho | Living |
| Sharanahua | mcd | Living |
| Shark Bay | ssv | Living |
| Sharwa | swq | Living |
| Shasta | sht | Extinct |
| Shatt | shj | Living |
| Shau | sqh | Living |
| Shawnee | sjw | Living |
| She | shx | Living |
| Shehri | shv | Living |
| Shekhawati | swv | Living |
| Shekkacho | moy | Living |
| Sheko | she | Living |
| Shelta | sth | Living |
| Shempire Senoufo | seb | Living |
| Shendu | shl | Living |
| Sheni | scv | Living |
| Sherbro | bun | Living |
| Sherdukpen | sdp | Living |
| Sherpa | xsr | Living |
| Sheshi Kham | kip | Living |
| Shi | shr | Living |
| Shihhi Arabic | ssh | Living |
| Shiki | gua | Living |
| Shilluk | shk | Living |
| Shina | scl | Living |
| Shinabo | snh | Extinct |
| Shipibo-Conibo | shp | Living |
| Shixing | sxg | Living |
| Sholaga | sle | Living |
| Shom Peng | sii | Living |
| Shona | sna | Living |
| Shoo-Minda-Nye | bcv | Living |
| Shor | cjs | Living |
| Shoshoni | shh | Living |
| Shua | shg | Living |
| Shuadit | sdt | Extinct |
| Shuar | jiv | Living |
| Shubi | suj | Living |
| Shughni | sgh | Living |
| Shumashti | sts | Living |
| Shumcho | scu | Living |
| Shuswap | shs | Living |
| Shuwa-Zamani | ksa | Living |
| Shwai | shw | Living |
| Shwe Palaung | pll | Living |
| Sialum | slw | Living |
| Siamou | sif | Living |
| Sian | spg | Living |
| Siane | snp | Living |
| Siang | sya | Living |
| Siar-Lak | sjr | Living |
| Siawi | mmp | Living |
| Sibe | nco | Living |
| Siberian Tatar | sty | Living |
| Sibu Melanau | sdx | Living |
| Sicanian | sxc | Ancient |
| Sicel | scx | Ancient |
| Sichuan Yi | iii | Living |
| Sicilian | scn | Living |
| Sìcìté Sénoufo | sep | Living |
| Siculo Arabic | sqr | Historic |
| Sidamo | sid | Living |
| Sidetic | xsd | Ancient |
| Sie | erg | Living |
| Sierra de Juárez Zapotec | zaa | Living |
| Sierra Leone Sign Language | sgx | Living |
| Sierra Negra Nahuatl | nsu | Living |
| Sighu | sxe | Living |
| Sihan | snr | Living |
| Sihuas Ancash Quechua | qws | Living |
| Sika | ski | Living |
| Sikaiana | sky | Living |
| Sikaritai | tty | Living |
| Sikiana | sik | Living |
| Sikkimese | sip | Living |
| Siksika | bla | Living |
| Sikule | skh | Living |
| Sila | slt | Living |
| Silacayoapan Mixtec | mks | Living |
| Sileibi | sbq | Living |
| Silesian | szl | Living |
| Silimo | wul | Living |
| Siliput | mkc | Living |
| Silopi | xsp | Living |
| Silt'e | stv | Living |
| Simaa | sie | Living |
| Simba | sbw | Living |
| Simbali | smg | Living |
| Simbari | smb | Living |
| Simbo | sbb | Living |
| Simeku | smz | Living |
| Simeulue | smr | Living |
| Simte | smt | Living |
| Sinagen | siu | Living |
| Sinasina | sst | Living |
| Sinaugoro | snc | Living |
| Sindarin | sjn | Constructed |
| Sindhi | snd | Living |
| Sindhi Bhil | sbn | Living |
| Sindihui Mixtec | xts | Living |
| Singa | sgm | Extinct |
| Singapore Sign Language | sls | Living |
| Singpho | sgp | Living |
| Sinhala | sin | Living |
| Sinicahua Mixtec | xti | Living |
| Sininkere | skq | Living |
| Sinsauru | snz | Living |
| Sinte Romani | rmo | Living |
| Sinyar | sys | Living |
| Sio | xsi | Living |
| Siona | snn | Living |
| Sipacapense | qum | Living |
| Sira | swj | Living |
| Siraya | fos | Extinct |
| Sirenik Yupik | ysr | Extinct |
| Siri | sir | Living |
| Siriano | sri | Living |
| Sirionó | srq | Living |
| Sirmauri | srx | Living |
| Siroi | ssd | Living |
| Sissala | sld | Living |
| Sissano | sso | Living |
| Siuslaw | sis | Extinct |
| Sivandi | siy | Living |
| Siwai | siw | Living |
| Siwi | siz | Living |
| Siwu | akp | Living |
| Siyin Chin | csy | Living |
| Skagit | ska | Living |
| Skalvian | svx | Extinct |
| Skepi Creole Dutch | skw | Extinct |
| Skolt Sami | sms | Living |
| Skou | skv | Living |
| Slave (Athapascan) | den | Living |
| Slavomolisano | svm | Living |
| Slovak | slk | Living |
| Slovakian Sign Language | svk | Living |
| Slovenian | slv | Living |
| Small Flowery Miao | sfm | Living |
| Smärky Kanum | kxq | Living |
| Snohomish | sno | Living |
| Sô | sss | Living |
| So (Democratic Republic of Congo) | soc | Living |
| So'a | ssq | Living |
| Sobei | sob | Living |
| Sochiapam Chinantec | cso | Living |
| Soga | xog | Living |
| Sogdian | sog | Ancient |
| Soi | soj | Living |
| Sok | skk | Living |
| Sokoro | sok | Living |
| Solano | xso | Extinct |
| Soli | sby | Living |
| Solong | aaw | Living |
| Solos | sol | Living |
| Som | smc | Extinct |
| Somali | som | Living |
| Somba-Siawari | bmu | Living |
| Somrai | sor | Living |
| Somray | smu | Extinct |
| Somyev | kgt | Living |
| Sonaga | ysg | Living |
| Sonde | shc | Living |
| Songe | sop | Living |
| Songlai Chin | csj | Living |
| Songo | soo | Living |
| Songomeno | soe | Living |
| Songoora | sod | Living |
| Sonha | soi | Living |
| Sonia | siq | Living |
| Soninke | snk | Living |
| Sonsorol | sov | Living |
| Soo | teu | Living |
| Sop | urw | Living |
| Soqotri | sqt | Living |
| Sora | srb | Living |
| Sori-Harengan | sbh | Living |
| Sorkhei | sqo | Living |
| Sorothaptic | sxo | Ancient |
| Sorsogon Ayta | ays | Living |
| Sos Kundi | sdk | Living |
| Sota Kanum | krz | Living |
| Sou | sqq | Living |
| South African Sign Language | sfs | Living |
| South Awyu | aws | Living |
| South Azerbaijani | azb | Living |
| South Bolivian Quechua | quh | Living |
| South Central Banda | lnl | Living |
| South Central Dinka | dib | Living |
| South Efate | erk | Living |
| South Fali | fal | Living |
| South Giziga | giz | Living |
| South Lembata | lmf | Living |
| South Levantine Arabic | ajp | Living |
| South Marquesan | mqm | Living |
| South Muyu | kts | Living |
| South Ndebele | nbl | Living |
| South Nuaulu | nxl | Living |
| South Picene | spx | Ancient |
| South Slavey | xsl | Living |
| South Tairora | omw | Living |
| South Ucayali Ashéninka | cpy | Living |
| South Watut | mcy | Living |
| South West Bay | sns | Living |
| Southeast Ambrym | tvk | Living |
| Southeast Babar | vbb | Living |
| Southeast Ijo | ijs | Living |
| Southeast Pashai | psi | Living |
| Southeastern Dinka | dks | Living |
| Southeastern Ixtlán Zapotec | zpd | Living |
| Southeastern Kolami | nit | Living |
| Southeastern Nochixtlán Mixtec | mxy | Living |
| Southeastern Pomo | pom | Living |
| Southeastern Puebla Nahuatl | npl | Living |
| Southeastern Tarahumara | tcu | Living |
| Southeastern Tepehuan | stp | Living |
| Southern Alta | agy | Living |
| Southern Altai | alt | Living |
| Southern Amami-Oshima | ams | Living |
| Southern Aymara | ayc | Living |
| Southern Bai | bfs | Living |
| Southern Balochi | bcc | Living |
| Southern Betsimisaraka Malagasy | bzc | Living |
| Southern Binukidnon | mtw | Living |
| Southern Birifor | biv | Living |
| Southern Bobo Madaré | bwq | Living |
| Southern Bontok | obk | Living |
| Southern Carrier | caf | Living |
| Southern Catanduanes Bikol | bln | Living |
| Southern Conchucos Ancash Quechua | qxo | Living |
| Southern Dagaare | dga | Living |
| Southern Dong | kmc | Living |
| Southern East Cree | crj | Living |
| Southern Ghale | ghe | Living |
| Southern Gondi | ggo | Living |
| Southern Grebo | grj | Living |
| Southern Guiyang Hmong | hmy | Living |
| Southern Haida | hax | Living |
| Southern Hindko | hnd | Living |
| Southern Kalapuya | sxk | Extinct |
| Southern Kalinga | ksc | Living |
| Southern Kisi | kss | Living |
| Southern Kiwai | kjd | Living |
| Southern Kurdish | sdh | Living |
| Southern Lolopo | ysp | Living |
| Southern Luri | luz | Living |
| Southern Ma'di | snm | Living |
| Southern Mashan Hmong | hma | Living |
| Southern Mnong | mnn | Living |
| Southern Muji | ymc | Living |
| Southern Nago | nqg | Living |
| Southern Nambikuára | nab | Living |
| Southern Ngbandi | nbw | Living |
| Southern Nicobarese | nik | Living |
| Southern Nisu | nsd | Living |
| Southern Nuni | nnw | Living |
| Southern Ohlone | css | Extinct |
| Southern One | osu | Living |
| Southern Pame | pmz | Extinct |
| Southern Pashto | pbt | Living |
| Southern Pastaza Quechua | qup | Living |
| Southern Pomo | peq | Living |
| Southern Puebla Mixtec | mit | Living |
| Southern Puget Sound Salish | slh | Living |
| Southern Pumi | pmj | Living |
| Southern Qiandong Miao | hms | Living |
| Southern Qiang | qxs | Living |
| Southern Rengma Naga | nre | Living |
| Southern Rincon Zapotec | zsr | Living |
| Southern Roglai | rgs | Living |
| Southern Sama | ssb | Living |
| Southern Sami | sma | Living |
| Southern Samo | sbd | Living |
| Southern Sierra Miwok | skd | Living |
| Southern Sorsoganon | srv | Living |
| Southern Sotho | sot | Living |
| Southern Subanen | laa | Living |
| Southern Thai | sou | Living |
| Southern Tiwa | tix | Living |
| Southern Toussian | wib | Living |
| Southern Tujia | tjs | Living |
| Southern Tutchone | tce | Living |
| Southern Uzbek | uzs | Living |
| Southern Yamphu | lrr | Living |
| Southern Yukaghir | yux | Living |
| Southwest Gbaya | gso | Living |
| Southwest Palawano | plv | Living |
| Southwest Pashai | psh | Living |
| Southwest Tanna | nwi | Living |
| Southwestern Bontok | vbk | Living |
| Southwestern Dinka | dik | Living |
| Southwestern Fars | fay | Living |
| Southwestern Guiyang Hmong | hmg | Living |
| Southwestern Huishui Hmong | hmh | Living |
| Southwestern Nisu | nsv | Living |
| Southwestern Tarahumara | twr | Living |
| Southwestern Tepehuan | tla | Living |
| Southwestern Tlaxiaco Mixtec | meh | Living |
| Sowa | sww | Extinct |
| Sowanda | sow | Living |
| Soyaltepec Mazatec | vmp | Living |
| Soyaltepec Mixtec | vmq | Living |
| Spanish | spa | Living |
| Spanish Sign Language | ssp | Living |
| Spiti Bhoti | spt | Living |
| Spokane | spo | Living |
| Squamish | squ | Living |
| Sranan Tongo | srn | Living |
| Sri Lankan Creole Malay | sci | Living |
| Sri Lankan Sign Language | sqs | Living |
| Standard Arabic | arb | Living |
| Standard Estonian | ekk | Living |
| Standard Latvian | lvs | Living |
| Standard Malay | zsm | Living |
| Standard Moroccan Tamazight | zgh | Living |
| Stellingwerfs | stl | Living |
| Stod Bhoti | sbu | Living |
| sTodsde | jih | Living |
| Stoney | sto | Living |
| Straits Salish | str | Living |
| Suabo | szp | Living |
| Suarmin | seo | Living |
| Suau | swp | Living |
| Suba | sxb | Living |
| Suba-Simbiti | ssc | Living |
| Subiya | sbs | Living |
| Subtiaba | sut | Extinct |
| Sudanese Arabic | apd | Living |
| Sudanese Creole Arabic | pga | Living |
| Sudest | tgo | Living |
| Sudovian | xsv | Extinct |
| Suena | sue | Living |
| Suga | sgi | Living |
| Suganga | sug | Living |
| Sugut Dusun | kzs | Living |
| Sui | swi | Living |
| Suki | sui | Living |
| Suku | sub | Living |
| Sukuma | suk | Living |
| Sukur | syk | Living |
| Sukurum | zsu | Living |
| Sula | szn | Living |
| Sulka | sua | Living |
| Sulod | srg | Living |
| Suma | sqm | Living |
| Sumariup | siv | Living |
| Sumau | six | Living |
| Sumbawa | smw | Living |
| Sumbwa | suw | Living |
| Sumerian | sux | Ancient |
| Sumi Naga | nsm | Living |
| Sumtu Chin | csv | Living |
| Sunam | ssk | Living |
| Sundanese | sun | Living |
| Sunwar | suz | Living |
| Suoy | syo | Living |
| Supyire Senoufo | spp | Living |
| Sur | tdl | Living |
| Surbakhal | sbj | Living |
| Surgujia | sgj | Living |
| Suri | suq | Living |
| Surigaonon | sgd | Living |
| Surjapuri | sjp | Living |
| Sursurunga | sgz | Living |
| Suruahá | swx | Living |
| Surubu | sde | Living |
| Suruí | sru | Living |
| Suruí Do Pará | mdz | Living |
| Susquehannock | sqn | Extinct |
| Susu | sus | Living |
| Susuami | ssu | Living |
| Suundi | sdj | Living |
| Suwawa | swu | Living |
| Suyá | suy | Living |
| Svan | sva | Living |
| Swabian | swg | Living |
| Swahili (individual language) | swh | Living |
| Swahili (macrolanguage) | swa | Living |
| Swampy Cree | csw | Living |
| Swati | ssw | Living |
| Swedish | swe | Living |
| Swedish Sign Language | swl | Living |
| Swiss German | gsw | Living |
| Swiss-French Sign Language | ssr | Living |
| Swiss-German Sign Language | sgg | Living |
| Swiss-Italian Sign Language | slf | Living |
| Swo | sox | Living |
| Syenara Senoufo | shz | Living |
| Sylheti | syl | Living |
| Syriac | syr | Living |
| Taa | nmn | Living |
| Taabwa | tap | Living |
| Tabaa Zapotec | zat | Living |
| Tabaru | tby | Living |
| Tabasco Chontal | chf | Living |
| Tabasco Nahuatl | nhc | Extinct |
| Tabasco Zoque | zoq | Living |
| Tabassaran | tab | Living |
| Tabla | tnm | Living |
| Tabo | knv | Living |
| Tabriak | tzx | Living |
| Tacahua Mixtec | xtt | Living |
| Tacana | tna | Living |
| Tachawit | shy | Living |
| Tachelhit | shi | Living |
| Tachoni | lts | Living |
| Tadaksahak | dsq | Living |
| Tadyawan | tdy | Living |
| Tae' | rob | Living |
| Tafi | tcd | Living |
| Tagabawa | bgs | Living |
| Tagakaulo | klg | Living |
| Tagal Murut | mvv | Living |
| Tagalaka | tgz | Extinct |
| Tagalog | tgl | Living |
| Tagargrent | oua | Living |
| Tagbanwa | tbw | Living |
| Tagbu | tbm | Living |
| Tagdal | tda | Living |
| Tagin | tgj | Living |
| Tagish | tgx | Living |
| Tagoi | tag | Living |
| Tagwana Senoufo | tgw | Living |
| Tahaggart Tamahaq | thv | Living |
| Tahitian | tah | Living |
| Tahltan | tht | Living |
| Tai | taw | Living |
| Tai Daeng | tyr | Living |
| Tai Dam | blt | Living |
| Tai Do | tyj | Living |
| Tai Dón | twh | Living |
| Tai Hang Tong | thc | Living |
| Tai Hongjin | tiz | Living |
| Tai Laing | tjl | Living |
| Tai Loi | tlq | Living |
| Tai Long | thi | Living |
| Tai Mène | tmp | Living |
| Tai Nüa | tdd | Living |
| Tai Pao | tpo | Living |
| Tai Thanh | tmm | Living |
| Tai Ya | cuu | Living |
| Taiap | gpn | Living |
| Taikat | aos | Living |
| Tainae | ago | Living |
| Taino | tnq | Extinct |
| Tairaha | bxa | Living |
| Tairuma | uar | Living |
| Taita | dav | Living |
| Taiwan Sign Language | tss | Living |
| Ta'izzi-Adeni Arabic | acq | Living |
| Taje | pee | Living |
| Tajik | tgk | Living |
| Tajiki Arabic | abh | Living |
| Tajio | tdj | Living |
| Tajuasohn | tja | Living |
| Takelma | tkm | Extinct |
| Takestani | tks | Living |
| Takia | tbc | Living |
| Takua | tkz | Living |
| Takuu | nho | Living |
| Takwane | tke | Living |
| Tal | tal | Living |
| Tala | tak | Living |
| Talaud | tld | Living |
| Taliabu | tlv | Living |
| Talieng | tdf | Living |
| Talinga-Bwisi | tlj | Living |
| Talise | tlr | Living |
| Talodi | tlo | Living |
| Taloki | tlk | Living |
| Talondo' | tln | Living |
| Talossan | tzl | Constructed |
| Talu | yta | Living |
| Talysh | tly | Living |
| Tama (Chad) | tma | Living |
| Tama (Colombia) | ten | Extinct |
| Tamagario | tcg | Living |
| Taman (Indonesia) | tmn | Living |
| Taman (Myanmar) | tcl | Extinct |
| Tamanaku | tmz | Extinct |
| Tamashek | tmh | Living |
| Tamasheq | taq | Living |
| Tamazola Mixtec | vmx | Living |
| Tambas | tdk | Living |
| Tambora | xxt | Extinct |
| Tambotalo | tls | Living |
| Tambunan Dusun | kzt | Living |
| Tami | tmy | Living |
| Tamil | tam | Living |
| Tamki | tax | Living |
| Tamnim Citak | tml | Living |
| Tampias Lobu | low | Living |
| Tampuan | tpu | Living |
| Tampulma | tpm | Living |
| Tanacross | tcb | Living |
| Tanahmerah | tcm | Living |
| Tanaina | tfn | Living |
| Tanapag | tpv | Living |
| Tandaganon | tgn | Living |
| Tandia | tni | Living |
| Tandroy-Mahafaly Malagasy | tdx | Living |
| Tanema | tnx | Living |
| Tangale | tan | Living |
| Tangchangya | tnv | Living |
| Tanggu | tgu | Living |
| Tangkhul Naga (India) | nmf | Living |
| Tangkhul Naga (Myanmar) | ntx | Living |
| Tangko | tkx | Living |
| Tanglang | ytl | Living |
| Tangoa | tgp | Living |
| Tanguat | tbs | Living |
| Tangut | txg | Ancient |
| Tanimbili | tbe | Living |
| Tanimuca-Retuarã | tnc | Living |
| Tanjijili | uji | Living |
| Tanosy Malagasy | txy | Living |
| Tanudan Kalinga | kml | Living |
| Tanzanian Sign Language | tza | Living |
| Tapeba | tbb | Extinct |
| Tapei | afp | Living |
| Tapieté | tpj | Living |
| Tapirapé | taf | Living |
| Tarao Naga | tro | Living |
| Tareng | tgr | Living |
| Tariana | tae | Living |
| Tarifit | rif | Living |
| Tarjumo | txj | Living |
| Tarok | yer | Living |
| Taroko | trv | Living |
| Tarpia | tpf | Living |
| Tartessian | txr | Ancient |
| Tasawaq | twq | Living |
| Tase Naga | nst | Living |
| Tasmanian | xtz | Extinct |
| Tasmate | tmt | Living |
| Tataltepec Chatino | cta | Living |
| Tatana | txx | Living |
| Tatar | tat | Living |
| Tatuyo | tav | Living |
| Tauade | ttd | Living |
| Taulil | tuh | Living |
| Taungyo | tco | Living |
| Taupota | tpa | Living |
| Tause | tad | Living |
| Taushiro | trr | Living |
| Tausug | tsg | Living |
| Tauya | tya | Living |
| Taveta | tvs | Living |
| Tavoyan | tvn | Living |
| Tavringer Romani | rmu | Living |
| Tawala | tbo | Living |
| Tawallammat Tamajaq | ttq | Living |
| Tawandê | xtw | Living |
| Tawang Monpa | twm | Living |
| Tawara | twl | Living |
| Taworta | tbp | Living |
| Tawoyan | twy | Living |
| Tawr Chin | tcp | Living |
| Tày | tyz | Living |
| Tay Boi | tas | Extinct |
| Tay Khang | tnu | Living |
| Tày Sa Pa | tys | Living |
| Tày Tac | tyt | Living |
| Tayabas Ayta | ayy | Extinct |
| Tayart Tamajeq | thz | Living |
| Tayo | cks | Living |
| Taznatit | grr | Living |
| Tboli | tbl | Living |
| Tchitchege | tck | Living |
| Tchumbuli | bqa | Living |
| Teanu | tkw | Living |
| Tebul Sign Language | tsy | Living |
| Tebul Ure Dogon | dtu | Living |
| Tecpatlán Totonac | tcw | Living |
| Tedaga | tuq | Living |
| Tedim Chin | ctd | Living |
| Tee | tkq | Living |
| Téén | lor | Living |
| Tefaro | tfo | Living |
| Tegali | ras | Living |
| Tehit | kps | Living |
| Tehuelche | teh | Living |
| Tejalapan Zapotec | ztt | Living |
| Teke-Ebo | ebo | Living |
| Teke-Fuumu | ifm | Living |
| Teke-Kukuya | kkw | Living |
| Teke-Laali | lli | Living |
| Teke-Nzikou | nzu | Living |
| Teke-Tege | teg | Living |
| Teke-Tsaayi | tyi | Living |
| Teke-Tyee | tyx | Living |
| Tektiteko | ttc | Living |
| Tela-Masbuar | tvm | Living |
| Telefol | tlf | Living |
| Telugu | tel | Living |
| Teluti | tlt | Living |
| Tem | kdh | Living |
| Temacine Tamazight | tjo | Living |
| Temascaltepec Nahuatl | nhv | Living |
| Tembé | tqb | Living |
| Tembo (Kitembo) | tbt | Living |
| Tembo (Motembo) | tmv | Living |
| Teme | tdo | Living |
| Temein | teq | Living |
| Temi | soz | Living |
| Temiar | tea | Living |
| Temoaya Otomi | ott | Living |
| Temoq | tmo | Living |
| Tempasuk Dusun | tdu | Living |
| Temuan | tmw | Living |
| T'en | tct | Living |
| Tena Lowland Quichua | quw | Living |
| Tenango Otomi | otn | Living |
| Tene Kan Dogon | dtk | Living |
| Tenggarong Kutai Malay | vkt | Living |
| Tengger | tes | Living |
| Tenharim | pah | Living |
| Tenino | tqn | Living |
| Tenis | tns | Living |
| Tennet | tex | Living |
| Teop | tio | Living |
| Teor | tev | Living |
| Tepecano | tep | Extinct |
| Tepetotutla Chinantec | cnt | Living |
| Tepeuxila Cuicatec | cux | Living |
| Tepinapa Chinantec | cte | Living |
| Tepo Krumen | ted | Living |
| Ter Sami | sjt | Living |
| Tera | ttr | Living |
| Terebu | trb | Living |
| Terei | buo | Living |
| Tereno | ter | Living |
| Teressa | tef | Living |
| Tereweng | twg | Living |
| Teribe | tfr | Living |
| Terik | tec | Living |
| Termanu | twu | Living |
| Ternate | tft | Living |
| Ternateño | tmg | Extinct |
| Tesaka Malagasy | tkg | Living |
| Tese | keg | Living |
| Teshenawa | twc | Extinct |
| Teso | teo | Living |
| Tetela | tll | Living |
| Tetelcingo Nahuatl | nhg | Living |
| Tetete | teb | Extinct |
| Tetum | tet | Living |
| Tetun Dili | tdt | Living |
| Te'un | tve | Living |
| Teutila Cuicatec | cut | Living |
| Tewa (Indonesia) | twe | Living |
| Tewa (USA) | tew | Living |
| Tewe | twx | Living |
| Texcatepec Otomi | otx | Living |
| Texistepec Popoluca | poq | Living |
| Texmelucan Zapotec | zpz | Living |
| Tezoatlán Mixtec | mxb | Living |
| Tha | thy | Living |
| Thachanadan | thn | Living |
| Thado Chin | tcz | Living |
| Thai | tha | Living |
| Thai Sign Language | tsq | Living |
| Thai Song | soa | Living |
| Thaiphum Chin | cth | Living |
| Thakali | ths | Living |
| Thangal Naga | nki | Living |
| Thangmi | thf | Living |
| Thao | ssf | Living |
| Tharaka | thk | Living |
| Thawa | xtv | Extinct |
| Thayore | thd | Living |
| Thaypan | typ | Extinct |
| Thiin | iin | Extinct |
| Tho | tou | Living |
| Thompson | thp | Living |
| Thopho | ytp | Living |
| Thracian | txh | Ancient |
| Thu Lao | tyl | Living |
| Thudam | thw | Living |
| Thulung | tdh | Living |
| Thurawal | tbh | Extinct |
| Thuri | thu | Living |
| Tiagbamrin Aizi | ahi | Living |
| Tiale | mnl | Living |
| Tiang | tbj | Living |
| Tibea | ngy | Living |
| Tibetan | bod | Living |
| Tichurong | tcn | Living |
| Ticuna | tca | Living |
| Tidaá Mixtec | mtx | Living |
| Tidikelt Tamazight | tia | Living |
| Tidong | tid | Living |
| Tidore | tvo | Living |
| Tiéfo | tiq | Living |
| Tiemacèwè Bozo | boo | Living |
| Tiene | tii | Living |
| Tiéyaxo Bozo | boz | Living |
| Tifal | tif | Living |
| Tigak | tgc | Living |
| Tigon Mbembe | nza | Living |
| Tigre | tig | Living |
| Tigrinya | tir | Living |
| Tii | txq | Living |
| Tijaltepec Mixtec | xtl | Living |
| Tikar | tik | Living |
| Tikopia | tkp | Living |
| Tilapa Otomi | otl | Living |
| Tillamook | til | Extinct |
| Tilquiapan Zapotec | zts | Living |
| Tilung | tij | Living |
| Tima | tms | Living |
| Timbe | tim | Living |
| Timne | tem | Living |
| Timor Pidgin | tvy | Extinct |
| Timucua | tjm | Extinct |
| Timugon Murut | tih | Living |
| Tinani | lbf | Living |
| Tindi | tin | Living |
| Tingui-Boto | tgv | Extinct |
| Tinigua | tit | Living |
| Tinoc Kallahan | tne | Living |
| Tinputz | tpz | Living |
| Tippera | tpe | Living |
| Tira | tic | Living |
| Tirahi | tra | Living |
| Tiranige Diga Dogon | tde | Living |
| Tiri | cir | Living |
| Tiruray | tiy | Living |
| Tita | tdq | Living |
| Titan | ttv | Living |
| Tiv | tiv | Living |
| Tiwa | lax | Living |
| Tiwi | tiw | Living |
| Tjurruru | tju | Extinct |
| Tlachichilco Tepehua | tpt | Living |
| Tlacoapa Me'phaa | tpl | Living |
| Tlacoatzintepec Chinantec | ctl | Living |
| Tlacolulita Zapotec | zpk | Living |
| Tlahuitoltepec Mixe | mxp | Living |
| Tlamacazapa Nahuatl | nuz | Living |
| Tlazoyaltepec Mixtec | mqh | Living |
| Tlingit | tli | Living |
| To | toz | Living |
| To'abaita | mlu | Living |
| Toaripi | tqo | Living |
| Toba | tob | Living |
| Tobagonian Creole English | tgh | Living |
| Toba-Maskoy | tmf | Living |
| Tobanga | tng | Living |
| Tobati | tti | Living |
| Tobelo | tlb | Living |
| Tobian | tox | Living |
| Tobilung | tgb | Living |
| Tobo | tbv | Living |
| Tocantins Asurini | asu | Living |
| Tocho | taz | Living |
| Toda | tcx | Living |
| Todrah | tdr | Living |
| Tofanma | tlg | Living |
| Tofin Gbe | tfi | Living |
| Togbo-Vara Banda | tor | Living |
| Togoyo | tgy | Extinct |
| Tohono O'odham | ood | Living |
| Tojolabal | toj | Living |
| Tok Pisin | tpi | Living |
| Tokano | zuh | Living |
| Tokelau | tkl | Living |
| Tokharian A | xto | Ancient |
| Tokharian B | txb | Ancient |
| Toku-No-Shima | tkn | Living |
| Tol | jic | Living |
| Tolaki | lbw | Living |
| Tolomako | tlm | Living |
| Tolowa | tol | Living |
| Toma | tod | Living |
| Tomadino | tdi | Living |
| Tombelala | ttp | Living |
| Tombonuo | txa | Living |
| Tombulu | tom | Living |
| Tomedes | toe | Extinct |
| Tomini | txm | Living |
| Tommo So Dogon | dto | Living |
| Tomo Kan Dogon | dtm | Living |
| Tomoip | tqp | Living |
| Tondano | tdn | Living |
| Tondi Songway Kiini | tst | Living |
| Tonga (Nyasa) | tog | Living |
| Tonga (Thailand) | tnz | Living |
| Tonga (Tonga Islands) | ton | Living |
| Tonga (Zambia) | toi | Living |
| Tongwe | tny | Living |
| Tonjon | tjn | Extinct |
| Tonkawa | tqw | Extinct |
| Tonsawang | tnw | Living |
| Tonsea | txs | Living |
| Tontemboan | tnt | Living |
| Tooro | ttj | Living |
| Topoiyo | toy | Living |
| Toposa | toq | Living |
| Torá | trz | Extinct |
| Toraja-Sa'dan | sda | Living |
| Toram | trj | Living |
| Torau | ttu | Living |
| Tornedalen Finnish | fit | Living |
| Toro | tdv | Living |
| Toro So Dogon | dts | Living |
| Toro Tegu Dogon | dtt | Living |
| Toromono | tno | Living |
| Torona | tqr | Extinct |
| Torres Strait Creole | tcs | Living |
| Torricelli | tei | Living |
| Torwali | trw | Living |
| Tosk Albanian | als | Living |
| Totela | ttl | Living |
| Toto | txo | Living |
| Totoli | txe | Living |
| Totomachapan Zapotec | zph | Living |
| Totontepec Mixe | mto | Living |
| Totoro | ttk | Living |
| Touo | tqu | Living |
| Toura (Côte d'Ivoire) | neb | Living |
| Toura (Papua New Guinea) | don | Living |
| Towei | ttn | Living |
| Transalpine Gaulish | xtg | Ancient |
| Traveller Danish | rmd | Extinct |
| Traveller Norwegian | rmg | Living |
| Traveller Scottish | trl | Living |
| Tregami | trm | Living |
| Tremembé | tme | Extinct |
| Trieng | stg | Living |
| Trimuris | tip | Living |
| Tring | tgq | Living |
| Tringgus-Sembaan Bidayuh | trx | Living |
| Trinidad and Tobago Sign Language | lst | Living |
| Trinidadian Creole English | trf | Living |
| Trinitario | trn | Living |
| Trió | tri | Living |
| Truká | tka | Extinct |
| Trumai | tpy | Living |
| Tsaangi | tsa | Living |
| Tsakhur | tkr | Living |
| Tsakonian | tsd | Living |
| Tsakwambo | kvz | Living |
| Tsamai | tsb | Living |
| Tsat | huq | Living |
| Tseku | tsk | Living |
| Tsetsaut | txc | Extinct |
| Tshangla | tsj | Living |
| Tsikimba | kdl | Living |
| Tsimané | cas | Living |
| Tsimihety Malagasy | xmw | Living |
| Tsimshian | tsi | Living |
| Tsishingini | tsw | Living |
| Tso | ldp | Living |
| Tsoa | hio | Living |
| Tsogo | tsv | Living |
| Tsonga | tso | Living |
| Tsotso | lto | Living |
| Tsou | tsu | Living |
| Tsucuba | cbq | Living |
| Tsum | ttz | Living |
| Ts'ün-Lao | tsl | Living |
| Tsuvadi | tvd | Living |
| Tsuvan | tsh | Living |
| Tswa | tsc | Living |
| Tswana | tsn | Living |
| Tswapong | two | Living |
| Tu | mjg | Living |
| Tuamotuan | pmt | Living |
| Tubar | tbu | Extinct |
| Tübatulabal | tub | Living |
| Tucano | tuo | Living |
| Tugen | tuy | Living |
| Tugun | tzn | Living |
| Tugutil | tuj | Living |
| Tukang Besi North | khc | Living |
| Tukang Besi South | bhq | Living |
| Tuki | bag | Living |
| Tukpa | tpq | Living |
| Tukudede | tkd | Living |
| Tukumanféd | tkf | Extinct |
| Tula | tul | Living |
| Tulehu | tlu | Living |
| Tulishi | tey | Living |
| Tulu | tcy | Living |
| Tulu-Bohuai | rak | Living |
| Tuma-Irumu | iou | Living |
| Tumak | tmc | Living |
| Tumari Kanuri | krt | Living |
| Tumbuka | tum | Living |
| Tumi | kku | Living |
| Tumleo | tmq | Living |
| Tumshuqese | xtq | Historic |
| Tumtum | tbr | Living |
| Tumulung Sisaala | sil | Living |
| Tumzabt | mzb | Living |
| Tundra Enets | enh | Living |
| Tunen | tvu | Living |
| Tungag | lcm | Living |
| Tunggare | trt | Living |
| Tunia | tug | Living |
| Tunica | tun | Extinct |
| Tunisian Arabic | aeb | Living |
| Tunisian Sign Language | tse | Living |
| Tunjung | tjg | Living |
| Tunni | tqq | Living |
| Tunzu | dza | Living |
| Tuotomb | ttf | Living |
| Tuparí | tpr | Living |
| Tupí | tpw | Extinct |
| Tupinambá | tpn | Extinct |
| Tupinikin | tpk | Extinct |
| Tupuri | tui | Living |
| Turaka | trh | Living |
| Turi | trd | Living |
| Turiwára | twt | Extinct |
| Turka | tuz | Living |
| Turkana | tuv | Living |
| Turkic Khalaj | klj | Living |
| Turkish | tur | Living |
| Turkish Sign Language | tsm | Living |
| Turkmen | tuk | Living |
| Turks And Caicos Creole English | tch | Living |
| Turoyo | tru | Living |
| Turumsa | tqm | Living |
| Turung | try | Extinct |
| Tuscarora | tus | Living |
| Tutelo | tta | Extinct |
| Tutong | ttg | Living |
| Tutsa Naga | tvt | Living |
| Tutuba | tmi | Living |
| Tututepec Mixtec | mtu | Living |
| Tututni | tuu | Living |
| Tuvalu | tvl | Living |
| Tuvinian | tyv | Living |
| Tuwali Ifugao | ifk | Living |
| Tuwari | tww | Living |
| Tuwuli | bov | Living |
| Tuxá | tud | Extinct |
| Tuxináwa | tux | Extinct |
| Tuyuca | tue | Living |
| Twana | twa | Extinct |
| Twendi | twn | Living |
| Twents | twd | Living |
| Twi | twi | Living |
| Tyap | kcg | Living |
| Tyaraity | woa | Living |
| Tzeltal | tzh | Living |
| Tzotzil | tzo | Living |
| Tz'utujil | tzj | Living |
| U | uuu | Living |
| Uab Meto | aoz | Living |
| Uamué | uam | Extinct |
| Uare | ksj | Living |
| Ubaghara | byc | Living |
| Ubang | uba | Living |
| Ubi | ubi | Living |
| Ubir | ubr | Living |
| Ubykh | uby | Extinct |
| Ucayali-Yurúa Ashéninka | cpb | Living |
| Uda | uda | Living |
| Udi | udi | Living |
| Udihe | ude | Living |
| Udmurt | udm | Living |
| Uduk | udu | Living |
| Ufim | ufi | Living |
| Ugandan Sign Language | ugn | Living |
| Ugaritic | uga | Ancient |
| Ughele | uge | Living |
| Ugong | ugo | Living |
| Uhami | uha | Living |
| Uighur | uig | Living |
| Uisai | uis | Living |
| Ujir | udj | Living |
| Ukaan | kcf | Living |
| Ukhwejo | ukh | Living |
| Ukit | umi | Living |
| Ukpe-Bayobiri | ukp | Living |
| Ukpet-Ehom | akd | Living |
| Ukrainian | ukr | Living |
| Ukrainian Sign Language | ukl | Living |
| Ukue | uku | Living |
| Ukuriguma | ukg | Living |
| Ukwa | ukq | Living |
| Ukwuani-Aboh-Ndoni | ukw | Living |
| Ulau-Suain | svb | Living |
| Ulch | ulc | Living |
| Ulithian | uli | Living |
| Ullatan | ull | Living |
| Ulukwumi | ulb | Living |
| Ulumanda' | ulm | Living |
| Ulwa | ulw | Living |
| Uma | ppk | Living |
| Uma' Lasan | xky | Living |
| Uma' Lung | ulu | Living |
| Umanakaina | gdn | Living |
| Umatilla | uma | Living |
| Umbindhamu | umd | Extinct |
| Umbrian | xum | Ancient |
| Umbugarla | umr | Extinct |
| Umbundu | umb | Living |
| Umbu-Ungu | ubu | Living |
| Umbuygamu | umg | Extinct |
| Ume Sami | sju | Living |
| Umeda | upi | Living |
| Umiida | xud | Extinct |
| Umiray Dumaget Agta | due | Living |
| Umon | umm | Living |
| Umotína | umo | Extinct |
| Umpila | ump | Living |
| Una | mtg | Living |
| Unami | unm | Extinct |
| Unde Kaili | unz | Living |
| Uneapa | bbn | Living |
| Uneme | une | Living |
| Unggaranggu | xun | Extinct |
| Unggumi | xgu | Living |
| Ungkue | gku | Extinct |
| Unserdeutsch | uln | Living |
| Unua | onu | Living |
| Unubahe | unu | Living |
| Upper Chehalis | cjh | Extinct |
| Upper Grand Valley Dani | dna | Living |
| Upper Guinea Crioulo | pov | Living |
| Upper Kinabatangan | dmg | Living |
| Upper Kuskokwim | kuu | Living |
| Upper Necaxa Totonac | tku | Living |
| Upper Saxon | sxu | Living |
| Upper Sorbian | hsb | Living |
| Upper Tanana | tau | Living |
| Upper Ta'oih | tth | Living |
| Upper Taromi | tov | Living |
| Upper Umpqua | xup | Extinct |
| Ura (Papua New Guinea) | uro | Living |
| Ura (Vanuatu) | uur | Living |
| Uradhi | urf | Extinct |
| Urak Lawoi' | urk | Living |
| Urali | url | Living |
| Urapmin | urm | Living |
| Urarina | ura | Living |
| Urartian | xur | Ancient |
| Urat | urt | Living |
| Urdu | urd | Living |
| Urhobo | urh | Living |
| Uri | uvh | Living |
| Urigina | urg | Living |
| Urim | uri | Living |
| Urimo | urx | Living |
| Uripiv-Wala-Rano-Atchin | upv | Living |
| Urningangg | urc | Extinct |
| Uru | ure | Living |
| Uruangnirin | urn | Living |
| Uruava | urv | Extinct |
| Urubú-Kaapor | urb | Living |
| Urubú-Kaapor Sign Language | uks | Living |
| Uru-Eu-Wau-Wau | urz | Living |
| Uruguayan Sign Language | ugy | Living |
| Urum | uum | Living |
| Urumi | uru | Extinct |
| Uru-Pa-In | urp | Living |
| Usaghade | usk | Living |
| Usan | wnu | Living |
| Usarufa | usa | Living |
| Ushojo | ush | Living |
| Usila Chinantec | cuc | Living |
| Usku | ulf | Living |
| Uspanteco | usp | Living |
| Usui | usi | Living |
| Utarmbung | omo | Living |
| Ute-Southern Paiute | ute | Living |
| ut-Ma'in | gel | Living |
| Utu | utu | Living |
| Uvbie | evh | Living |
| Uya | usu | Living |
| Uyajitaya | duk | Living |
| Uzbek | uzb | Living |
| Uzbeki Arabic | auz | Living |
| Uzekwe | eze | Living |
| Vaagri Booli | vaa | Living |
| Vafsi | vaf | Living |
| Vaghat-Ya-Bijim-Legeri | bij | Living |
| Vaghri | vgr | Living |
| Vaghua | tva | Living |
| Vagla | vag | Living |
| Vai | vai | Living |
| Vaiphei | vap | Living |
| Vale | vae | Living |
| Valencian Sign Language | vsv | Living |
| Valle Nacional Chinantec | cvn | Living |
| Valley Maidu | vmv | Extinct |
| Valman | van | Living |
| Valpei | vlp | Living |
| Vamale | mkt | Living |
| Vame | mlr | Living |
| Vandalic | xvn | Ancient |
| Vangunu | mpr | Living |
| Vanimo | vam | Living |
| Vano | vnk | Living |
| Vanuma | vau | Living |
| Vao | vao | Living |
| Varhadi-Nagpuri | vah | Living |
| Varisi | vrs | Living |
| Varli | vav | Living |
| Vasavi | vas | Living |
| Veddah | ved | Living |
| Vehes | val | Living |
| Veluws | vel | Living |
| Vemgo-Mabas | vem | Living |
| Venda | ven | Living |
| Venetian | vec | Living |
| Venetic | xve | Ancient |
| Venezuelan Sign Language | vsl | Living |
| Vengo | bav | Living |
| Ventureño | veo | Extinct |
| Veps | vep | Living |
| Vera'a | vra | Living |
| Vestinian | xvs | Ancient |
| Vidunda | vid | Living |
| Viemo | vig | Living |
| Vietnamese | vie | Living |
| Vilela | vil | Living |
| Vili | vif | Living |
| Villa Viciosa Agta | dyg | Extinct |
| Vincentian Creole English | svc | Living |
| Vinmavis | vnm | Living |
| Vinza | vin | Living |
| Virgin Islands Creole English | vic | Living |
| Vishavan | vis | Living |
| Viti | vit | Living |
| Vitou | vto | Living |
| Vitu | wiv | Living |
| Vlaams | vls | Living |
| Vlaamse Gebarentaal | vgt | Living |
| Vlax Romani | rmy | Living |
| Volapük | vol | Constructed |
| Volscian | xvo | Ancient |
| Vono | kch | Living |
| Voro | vor | Living |
| Võro | vro | Living |
| Votic | vot | Living |
| Vumbu | vum | Living |
| Vunapu | vnp | Living |
| Vunjo | vun | Living |
| Vurës | msn | Living |
| Vute | vut | Living |
| Vwanji | wbi | Living |
| Wa | wbm | Living |
| Waama | wwa | Living |
| Waamwang | wmn | Extinct |
| Waata | ssn | Living |
| Wab | wab | Living |
| Wabo | wbb | Living |
| Waboda | kmx | Living |
| Waci Gbe | wci | Living |
| Wadaginam | wdg | Living |
| Waddar | wbq | Living |
| Wadi Wadi | xwd | Extinct |
| Wadikali | wdk | Extinct |
| Wadiyara Koli | kxp | Living |
| Wadjabangayi | wdy | Extinct |
| Wadjiginy | wdj | Living |
| Wadjigu | wdu | Extinct |
| Wae Rana | wrx | Living |
| Wa'ema | wag | Living |
| Waffa | waj | Living |
| Wagawaga | wgb | Living |
| Wagaya | wga | Extinct |
| Wagdi | wbr | Living |
| Wageman | waq | Living |
| Wagi | fad | Living |
| Wahau Kayan | whu | Living |
| Wahau Kenyah | whk | Living |
| Wahgi | wgi | Living |
| Waigali | wbk | Living |
| Waigeo | wgo | Living |
| Wailaki | wlk | Extinct |
| Wailapa | wlr | Living |
| Waima | rro | Living |
| Waima'a | wmh | Living |
| Waimaha | bao | Living |
| Waimiri-Atroari | atr | Living |
| Waioli | wli | Living |
| Waiwai | waw | Living |
| Waja | wja | Living |
| Wajarri | wbv | Living |
| Wajuk | xwj | Extinct |
| Waka | wav | Living |
| Wakabunga | wwb | Extinct |
| Wakawaka | wkw | Extinct |
| Wakde | wkd | Living |
| Wakhi | wbl | Living |
| Wakoná | waf | Extinct |
| Wala | lgl | Living |
| Walak | wlw | Living |
| Walangama | nlw | Extinct |
| Wali (Ghana) | wlx | Living |
| Wali (Sudan) | wll | Living |
| Waling | wly | Extinct |
| Walio | wla | Living |
| Walla Walla | waa | Living |
| Wallisian | wls | Living |
| Walloon | wln | Living |
| Walmajarri | wmt | Living |
| Walser | wae | Living |
| Walungge | ola | Living |
| Wamas | wmc | Living |
| Wambaya | wmb | Living |
| Wambon | wms | Living |
| Wambule | wme | Living |
| Wamey | cou | Living |
| Wamin | wmi | Extinct |
| Wampanoag | wam | Extinct |
| Wampar | lbq | Living |
| Wampur | waz | Living |
| Wan | wan | Living |
| Wanambre | wnb | Living |
| Wanap | wnp | Living |
| Wancho Naga | nnp | Living |
| Wanda | wbh | Living |
| Wandala | mfi | Living |
| Wandamen | wad | Living |
| Wandarang | wnd | Extinct |
| Wandji | wdd | Living |
| Wané | hwa | Living |
| Waneci | wne | Living |
| Wanga | lwg | Living |
| Wangaaybuwan-Ngiyambaa | wyb | Living |
| Wanggamala | wnm | Extinct |
| Wangganguru | wgg | Extinct |
| Wanggom | wng | Living |
| Wangkayutyuru | wky | Extinct |
| Wangkumara | xwk | Extinct |
| Wanman | wbt | Living |
| Wannu | jub | Living |
| Wano | wno | Living |
| Wantoat | wnc | Living |
| Wanukaka | wnk | Living |
| Wanyi | wny | Living |
| Waorani | auc | Living |
| Wapan | juk | Living |
| Wãpha | juw | Living |
| Wapishana | wap | Living |
| Wappo | wao | Extinct |
| Wara | wbf | Living |
| Wára | tci | Living |
| Warao | wba | Living |
| Warapu | wra | Living |
| Waray (Australia) | wrz | Extinct |
| Waray (Philippines) | war | Living |
| Wardaman | wrr | Living |
| Wardandi | wxw | Extinct |
| Warduji | wrd | Living |
| Warembori | wsa | Living |
| Wares | wai | Living |
| Waris | wrs | Living |
| Waritai | wbe | Living |
| Wariyangga | wri | Extinct |
| War-Jaintia | aml | Living |
| Warji | wji | Living |
| Warkay-Bipim | bgv | Living |
| Warlmanpa | wrl | Living |
| Warlpiri | wbp | Living |
| Warluwara | wrb | Extinct |
| Warnang | wrn | Living |
| Waropen | wrp | Living |
| Warrgamay | wgy | Living |
| Warrwa | wwr | Extinct |
| Waru | wru | Living |
| Warumungu | wrm | Living |
| Waruna | wrv | Living |
| Warungu | wrg | Extinct |
| Warwar Feni | hrw | Living |
| Wasa | wss | Living |
| Wasco-Wishram | wac | Living |
| Wasembo | gsp | Living |
| Washo | was | Living |
| Waskia | wsk | Living |
| Wasu | wsu | Extinct |
| Watakataui | wtk | Living |
| Watam | wax | Living |
| Wathawurrung | wth | Extinct |
| Watiwa | wtf | Living |
| Watubela | wah | Living |
| Waube | kop | Living |
| Waurá | wau | Living |
| Wauyai | wuy | Living |
| Wawa | www | Living |
| Wawonii | wow | Living |
| Waxianghua | wxa | Living |
| Wayampi | oym | Living |
| Wayana | way | Living |
| Wayanad Chetti | ctt | Living |
| Wayoró | wyr | Living |
| Wayu | vay | Living |
| Wayuu | guc | Living |
| Wè Northern | wob | Living |
| Wè Southern | gxx | Living |
| Wè Western | wec | Living |
| Wedau | wed | Living |
| Weh | weh | Living |
| Wejewa | wew | Living |
| Weliki | klh | Living |
| Welsh | cym | Living |
| Welsh Romani | rmw | Living |
| Wemale | weo | Living |
| Wemba Wemba | xww | Extinct |
| Weme Gbe | wem | Living |
| Wergaia | weg | Living |
| Weri | wer | Living |
| Wersing | kvw | Living |
| West Albay Bikol | fbl | Living |
| West Ambae | nnd | Living |
| West Berawan | zbw | Living |
| West Central Banda | bbp | Living |
| West Central Oromo | gaz | Living |
| West Coast Bajau | bdr | Living |
| West Damar | drn | Living |
| West Goodenough | ddi | Living |
| West Kewa | kew | Living |
| West Lembata | lmj | Living |
| West Makian | mqs | Living |
| West Masela | mss | Living |
| West Tarangan | txn | Living |
| West Uvean | uve | Living |
| West Yugur | ybe | Living |
| West-Central Limba | lia | Living |
| Western Abnaki | abe | Living |
| Western Apache | apw | Living |
| Western Arrarnta | are | Living |
| Western Balochi | bgn | Living |
| Western Bolivian Guaraní | gnw | Living |
| Western Bru | brv | Living |
| Western Bukidnon Manobo | mbb | Living |
| Western Cham | cja | Living |
| Western Dani | dnw | Living |
| Western Durango Nahuatl | azn | Living |
| Western Fijian | wyy | Living |
| Western Frisian | fry | Living |
| Western Gurung | gvr | Living |
| Western Highland Chatino | ctp | Living |
| Western Highland Purepecha | pua | Living |
| Western Huasteca Nahuatl | nhw | Living |
| Western Juxtlahuaca Mixtec | jmx | Living |
| Western Kanjobal | knj | Living |
| Western Karaboro | kza | Living |
| Western Katu | kuf | Living |
| Western Kayah | kyu | Living |
| Western Keres | kjq | Living |
| Western Krahn | krw | Living |
| Western Lalu | ywl | Living |
| Western Lawa | lcp | Living |
| Western Magar | mrd | Living |
| Western Maninkakan | mlq | Living |
| Western Mari | mrj | Living |
| Western Mashan Hmong | hmw | Living |
| Western Meohang | raf | Living |
| Western Muria | mut | Living |
| Western Neo-Aramaic | amw | Living |
| Western Niger Fulfulde | fuh | Living |
| Western Ojibwa | ojw | Living |
| Western Panjabi | pnb | Living |
| Western Parbate Kham | kjl | Living |
| Western Penan | pne | Living |
| Western Sisaala | ssl | Living |
| Western Subanon | suc | Living |
| Western Tamang | tdg | Living |
| Western Tawbuid | twb | Living |
| Western Totonac | tqt | Living |
| Western Tunebo | tnb | Living |
| Western Xiangxi Miao | mmr | Living |
| Western Xwla Gbe | xwl | Living |
| Western Yiddish | yih | Living |
| Westphalien | wep | Living |
| Wetamut | wwo | Living |
| Wewaw | wea | Extinct |
| Weyto | woy | Extinct |
| White Gelao | giw | Living |
| White Lachi | lwh | Living |
| Whitesands | tnp | Living |
| Wiarumus | tua | Living |
| Wichí Lhamtés Güisnay | mzh | Living |
| Wichí Lhamtés Nocten | mtp | Living |
| Wichí Lhamtés Vejoz | wlv | Living |
| Wichita | wic | Living |
| Wikalkan | wik | Living |
| Wik-Epa | wie | Extinct |
| Wik-Iiyanh | wij | Living |
| Wik-Keyangan | wif | Extinct |
| Wik-Me'anha | wih | Living |
| Wik-Mungkan | wim | Living |
| Wik-Ngathana | wig | Living |
| Wikngenchera | wua | Living |
| Wilawila | wil | Extinct |
| Wintu | wnw | Living |
| Winyé | kst | Living |
| Wipi | gdr | Living |
| Wiradhuri | wrh | Extinct |
| Wiraféd | wir | Extinct |
| Wirangu | wgu | Extinct |
| Wiru | wiu | Living |
| Wiyot | wiy | Extinct |
| Woccon | xwc | Extinct |
| Wogamusin | wog | Living |
| Wogeo | woc | Living |
| Woi | wbw | Living |
| Woiwurrung | wyi | Extinct |
| Wojenaka | jod | Living |
| Wolane | wle | Living |
| Wolani | wod | Living |
| Wolaytta | wal | Living |
| Woleaian | woe | Living |
| Wolio | wlo | Living |
| Wolof | wol | Living |
| Wom (Nigeria) | wom | Living |
| Wom (Papua New Guinea) | wmo | Living |
| Womo | wmx | Living |
| Wongo | won | Living |
| Woods Cree | cwd | Living |
| Woria | wor | Living |
| Worimi | kda | Extinct |
| Worodougou | jud | Living |
| Worrorra | wro | Extinct |
| Wotapuri-Katarqalai | wsv | Extinct |
| Wotjobaluk | xwt | Extinct |
| Wotu | wtw | Living |
| Woun Meu | noa | Living |
| Written Oirat | xwo | Extinct |
| Wu Chinese | wuu | Living |
| Wuding-Luquan Yi | ywq | Living |
| Wudu | wud | Living |
| Wuliwuli | wlu | Extinct |
| Wulna | wux | Living |
| Wumboko | bqm | Living |
| Wumbvu | wum | Living |
| Wumeng Nasu | ywu | Living |
| Wunai Bunu | bwn | Living |
| Wunambal | wub | Living |
| Wunumara | wnn | Extinct |
| Wurrugu | wur | Extinct |
| Wusa Nasu | yig | Living |
| Wushi | bse | Living |
| Wusi | wsi | Living |
| Wutung | wut | Living |
| Wutunhua | wuh | Living |
| Wuvulu-Aua | wuv | Living |
| Wuzlam | udl | Living |
| Wyandot | wya | Living |
| Wymysorys | wym | Living |
| Xaasongaxango | kao | Living |
| Xadani Zapotec | zax | Living |
| Xakriabá | xkr | Extinct |
| Xamtanga | xan | Living |
| Xanaguía Zapotec | ztg | Living |
| Xârâcùù | ane | Living |
| Xârâgurè | axx | Living |
| Xavánte | xav | Living |
| Xerénte | xer | Living |
| Xetá | xet | Living |
| Xhosa | xho | Living |
| Xiang Chinese | hsn | Living |
| Xibe | sjo | Living |
| Xicotepec De Juárez Totonac | too | Living |
| Xinca | xin | Extinct |
| Xingú Asuriní | asn | Living |
| Xipaya | xiy | Living |
| Xipináwa | xip | Extinct |
| Xiri | xii | Living |
| Xiriâna | xir | Extinct |
| Xishanba Lalo | ywt | Living |
| Xokleng | xok | Living |
| Xukurú | xoo | Extinct |
| Xwela Gbe | xwe | Living |
| Yaaku | muu | Living |
| Yabaâna | ybn | Extinct |
| Yabarana | yar | Living |
| Yabem | jae | Living |
| Yaben | ybm | Living |
| Yabong | ybo | Living |
| Yabula Yabula | yxy | Extinct |
| Yace | ekr | Living |
| Yaeyama | rys | Living |
| Yafi | wfg | Living |
| Yagara | yxg | Extinct |
| Yagaria | ygr | Living |
| Yagnobi | yai | Living |
| Yagomi | ygm | Living |
| Yagua | yad | Living |
| Yagwoia | ygw | Living |
| Yahadian | ner | Living |
| Yahang | rhp | Living |
| Yahuna | ynu | Extinct |
| Yaka (Central African Republic) | axk | Living |
| Yaka (Congo) | iyx | Living |
| Yaka (Democratic Republic of Congo) | yaf | Living |
| Yakaikeke | ykk | Living |
| Yakama | yak | Living |
| Yakan | yka | Living |
| Yakha | ybh | Living |
| Yakoma | yky | Living |
| Yakut | sah | Living |
| Yala | yba | Living |
| Yalahatan | jal | Living |
| Yalakalore | xyl | Extinct |
| Yalálag Zapotec | zpu | Living |
| Yalarnnga | ylr | Extinct |
| Yale | nce | Living |
| Yaleba | ylb | Living |
| Yalunka | yal | Living |
| Yámana | yag | Living |
| Yamap | ymp | Living |
| Yamba | yam | Living |
| Yambes | ymb | Living |
| Yambeta | yat | Living |
| Yamdena | jmd | Living |
| Yameo | yme | Extinct |
| Yami | tao | Living |
| Yaminahua | yaa | Living |
| Yamna | ymn | Living |
| Yamongeri | ymg | Living |
| Yamphu | ybi | Living |
| Yana | ynn | Extinct |
| Yanahuanca Pasco Quechua | qur | Living |
| Yanda | yda | Extinct |
| Yanda Dom Dogon | dym | Living |
| Yandjibara | xyb | Extinct |
| Yandruwandha | ynd | Extinct |
| Yanesha' | ame | Living |
| Yang Zhuang | zyg | Living |
| Yangben | yav | Living |
| Yangkam | bsx | Living |
| Yangman | jng | Extinct |
| Yango | yng | Living |
| Yangulam | ynl | Living |
| Yangum Dey | yde | Living |
| Yangum Gel | ygl | Living |
| Yangum Mon | ymo | Living |
| Yankunytjatjara | kdd | Living |
| Yan-nhangu | jay | Living |
| Yan-nhangu Sign Language | yhs | Living |
| Yanomámi | wca | Living |
| Yanomamö | guu | Living |
| Yansi | yns | Living |
| Yanyuwa | jao | Living |
| Yao | yao | Living |
| Yaosakor Asmat | asy | Living |
| Yaouré | yre | Living |
| Yapese | yap | Living |
| Yapunda | yev | Living |
| Yaqay | jaq | Living |
| Yaqui | yaq | Living |
| Yarawata | yrw | Living |
| Yardliyawarra | yxl | Extinct |
| Yareba | yrb | Living |
| Yareni Zapotec | zae | Living |
| Yarí | yri | Living |
| Yarluyandi | yry | Living |
| Yarsun | yrs | Living |
| Yasa | yko | Living |
| Yassic | ysc | Extinct |
| Yatay | yty | Extinct |
| Yatee Zapotec | zty | Living |
| Yatzachi Zapotec | zav | Living |
| Yau (Morobe Province) | yuw | Living |
| Yau (Sandaun Province) | yyu | Living |
| Yaul | yla | Living |
| Yauma | yax | Living |
| Yaur | jau | Living |
| Yautepec Zapotec | zpb | Living |
| Yauyos Quechua | qux | Living |
| Yavitero | yvt | Extinct |
| Yawa | yva | Living |
| Yawalapití | yaw | Living |
| Yawanawa | ywn | Living |
| Yawarawarga | yww | Extinct |
| Yaweyuha | yby | Living |
| Yawijibaya | jbw | Extinct |
| Yawiyo | ybx | Living |
| Yawuru | ywr | Living |
| Yaygir | xya | Extinct |
| Yazgulyam | yah | Living |
| Yecuatla Totonac | tlc | Living |
| Yei | jei | Living |
| Yekhee | ets | Living |
| Yekora | ykr | Living |
| Yela | yel | Living |
| Yele | yle | Living |
| Yelmek | jel | Living |
| Yelogu | ylg | Living |
| Yemba | ybb | Living |
| Yemsa | jnj | Living |
| Yendang | ynq | Living |
| Yeni | yei | Extinct |
| Yeniche | yec | Living |
| Yerakai | yra | Living |
| Yeretuar | gop | Living |
| Yerong | yrn | Living |
| Yerukula | yeu | Living |
| Yessan-Mayo | yss | Living |
| Yetfa | yet | Living |
| Yevanic | yej | Living |
| Yeyi | yey | Living |
| Yiddish | yid | Living |
| Yidgha | ydg | Living |
| Yidiny | yii | Living |
| Yil | yll | Living |
| Yimas | yee | Living |
| Yimchungru Naga | yim | Living |
| Yinbaw Karen | kvu | Living |
| Yinchia | yin | Living |
| Yindjibarndi | yij | Living |
| Yindjilandji | yil | Extinct |
| Yine | pib | Living |
| Yinggarda | yia | Living |
| Yinhawangka | ywg | Living |
| Yiningayi | ygi | Extinct |
| Yintale Karen | kvy | Living |
| Yinwum | yxm | Extinct |
| Yir Yoront | yyr | Extinct |
| Yirandali | ljw | Living |
| Yirrk-Mel | yrm | Living |
| Yis | yis | Living |
| Yitha Yitha | xth | Extinct |
| Yiwom | gek | Living |
| Yoba | yob | Extinct |
| Yocoboué Dida | gud | Living |
| Yogad | yog | Living |
| Yoidik | ydk | Living |
| Yoke | yki | Living |
| Yokuts | yok | Living |
| Yol?u Sign Language | ygs | Living |
| Yola | yol | Extinct |
| Yoloxochitl Mixtec | xty | Living |
| Yom | pil | Living |
| Yombe | yom | Living |
| Yonaguni | yoi | Living |
| Yong | yno | Living |
| Yongbei Zhuang | zyb | Living |
| Yongkom | yon | Living |
| Yongnan Zhuang | zyn | Living |
| Yopno | yut | Living |
| Yora | mts | Living |
| Yoron | yox | Living |
| Yorta Yorta | xyy | Living |
| Yoruba | yor | Living |
| Yosondúa Mixtec | mpm | Living |
| Yotti | yot | Living |
| Youjiang Zhuang | zyj | Living |
| Youle Jinuo | jiu | Living |
| Younuo Bunu | buh | Living |
| Yout Wam | ytw | Living |
| Yoy | yoy | Living |
| Yuanga | nua | Living |
| Yucatec Maya Sign Language | msd | Living |
| Yucateco | yua | Living |
| Yuchi | yuc | Living |
| Yucuañe Mixtec | mvg | Living |
| Yucuna | ycn | Living |
| Yue Chinese | yue | Living |
| Yug | yug | Extinct |
| Yugambal | yub | Extinct |
| Yugoslavian Sign Language | ysl | Living |
| Yugul | ygu | Living |
| Yuhup | yab | Living |
| Yuki | yuk | Extinct |
| Yukpa | yup | Living |
| Yukuben | ybl | Living |
| Yulu | yul | Living |
| Yuqui | yuq | Living |
| Yuracare | yuz | Living |
| Yurats | rts | Extinct |
| Yurok | yur | Living |
| Yuru | ljx | Extinct |
| Yurutí | yui | Living |
| Yutanduchi Mixtec | mab | Living |
| Yuwana | yau | Living |
| Yuyu | yxu | Extinct |
| Zaachila Zapotec | ztx | Living |
| Zabana | kji | Living |
| Zacatepec Chatino | ctz | Living |
| Zacatlán-Ahuacatlán-Tepetzintla Nahuatl | nhi | Living |
| Zaghawa | zag | Living |
| Zaiwa | atb | Living |
| Zakhring | zkr | Living |
| Zambian Sign Language | zsl | Living |
| Zan Gula | zna | Living |
| Zanaki | zak | Living |
| Zande (individual language) | zne | Living |
| Zangskari | zau | Living |
| Zangwal | zah | Living |
| Zaniza Zapotec | zpw | Living |
| Záparo | zro | Living |
| Zapotec | zap | Living |
| Zaramo | zaj | Living |
| Zari | zaz | Living |
| Zarma | dje | Living |
| Zarphatic | zrp | Extinct |
| Zauzou | zal | Living |
| Zay | zwa | Living |
| Zayein Karen | kxk | Living |
| Zayse-Zergulla | zay | Living |
| Zaza | zza | Living |
| Zazao | jaj | Living |
| Zeem | zua | Living |
| Zeeuws | zea | Living |
| Zemba | dhm | Living |
| Zeme Naga | nzm | Living |
| Zemgalian | xzm | Extinct |
| Zenag | zeg | Living |
| Zenaga | zen | Living |
| Zenzontepec Chatino | czn | Living |
| Zerenkel | zrn | Living |
| Zhaba | zhb | Living |
| Zhang-Zhung | xzh | Ancient |
| Zhire | zhi | Living |
| Zhoa | zhw | Living |
| Zhuang | zha | Living |
| Zia | zia | Living |
| Zialo | zil | Living |
| Zigula | ziw | Living |
| Zimakani | zik | Living |
| Zimba | zmb | Living |
| Zimbabwe Sign Language | zib | Living |
| Zinza | zin | Living |
| Zire | sih | Living |
| Ziriya | zir | Extinct |
| Zizilivakan | ziz | Living |
| Zo'é | pto | Living |
| Zokhuo | yzk | Living |
| Zoogocho Zapotec | zpq | Living |
| Zoroastrian Dari | gbz | Living |
| Zotung Chin | czt | Living |
| Zou | zom | Living |
| Zulgo-Gemzek | gnd | Living |
| Zulu | zul | Living |
| Zumaya | zuy | Living |
| Zumbun | jmb | Living |
| Zuni | zun | Living |
| Zuojiang Zhuang | zzj | Living |
| Zyphe Chin | zyp | Living |
