Claim: Two of the Turkic languages that are considered vulnerable are the Kumyk language, which has 1,500,000 speakers and is considered to be the subgroups of the Kipchak languages,  and the Chuvash language,  which has 1,200,000 speakers and is considered to be the only surviving Oghur branch of Turkic languages.
Evidence: Kumyk (къумукъ тил, qumuq til) is a Turkic language, spoken by about 426,212 speakers — the Kumyks — in the Dagestan, North Ossetia and Chechen republics of the Russian Federation.