Slovenian or Slovene (slovenski jezik or shortly slovenščina) is an Indo-European language that belongs to the family of South Slavic languages. It is spoken by approximately 2 million speakers worldwide, the majority of whom live in Slovenia. Slovenian is one of the few languages to have preserved the dual grammatical number from Proto-Indo-European. Also, Slovenian and Slovakian are the two modern Slavic languages whose names for themselves literally mean "Slavic" (slověnskii in old Slavonic). The Slovenian language is also one of the official languages of the European Union.