Different tongues are possibly one's language (6)
I believe the answer is:
tuareg
(Other definitions for tuareg that I've seen before include "Member of nomadic Berber people of Sahara" , "One of a nomadic Berber people - eat rug (anag)" , "Nomadic Arab of N Africa" , "Member of nomadic group in N Africa" , "London district with oldest public picture gallery" .)