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.).
Chuvash language
Chuvash is the native language of the Chuvash people and an official language of Chuvashia. It is spoken by 1,640,000 persons in Russia and another 34,000 in other countries. 86% of ethnic Chuvash and 8% of the people of other ethnicities living in Chuvashia claimed knowledge of Chuvash language during the 2002 census. Despite that, and although Chuvash is taught at schools and sometimes used in the media, it is considered endangered, because Russian dominates in most spheres of life, and few children learning the language are likely to become active users.