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.).
Chechens
The Chechens belong to the Western Eurasian or "Caucasoid" race, specifically the Caucasus type. 
Chechens are black-, brown-, red- or fair-haired (with darker hair predominating) and eyes can be brown, blue or green, while skin is usually light. George Anchabadze notes that the physical traits of Chechens, which includes being taller than average, are typical of the "Caucasian type" which many other peoples of the Caucasus exhibit.