Interlingua Language Overview
How many people speak Interlingua?
~ 500
Where is Interlingua spoken?

Worldwide
Language family
International auxiliary language > Indo-European > Italic > Romance > Interlingua
Learn Interlingua Online
A great place to start for more information about Interlingua is Union Mundial pro Interlinua. (Recommended by Carlos E.)
There will be more Interlingua resources and useful info to come.
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