Claim: Two of the Turkic languages that are considered vulnerable are the Bashkir 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: It is spoken by approximately 1.4 million native speakers in Russia. 
1,042,989 (2010 census)