Chechens
In 1989, 73.4% spoke Russian, though this figure has declined due to the wars for a large number of reasons (including the lack of proper education, the refusal to learn the language, and the mass dispersal of the Chechen diaspora due to the war). Chechens in the diaspora often speak the language of the country they live in (English, German, Arabic, Polish, Georgian, etc.).
Chenchu language
Chenchu language is a Dravidian language which belongs to the Telugu branch of its South-Central family. This language is spoken mostly in Andhra Pradesh and Telangana states in India by about 28,754 people (1981 census) of the Chenchu Aboriginal forests hunter-gatherer tribe. It is also called Chenchukulam, Chenchwar, Chenswar or Choncharu.