I usually used to say that Hindi and English are my "First Tongue" but recently to my surprise, I came across a fictional language named "First Tongue" itself. Well, the language seems too amazing too as it was designed for a role-playing game "Werewolf" and is spoken by a werewolves tribes "
Uratha" in the game.
To relish your linguistic thirst, go through its glossary on
http://whitewolf.wikia.com/wiki/First_Tongue.
The funfact is most of the words are taken from Sumerian,the language of the ancient Measopotamian Civilization, one of the eariest cradles of civilization.