The Turkic languages are a language family of over 35 documented languages, spoken by the Turkic peoples of Eurasia from Eastern Europe and Southern Europe to Central Asia, East Asia, North Asia (Siberia), and West Asia. The Turkic languages originated in a region of East Asia spanning from Mongolia to Northwest China, where Proto-Turkic is thought to have been spoken, from where they expanded to Central Asia and farther west during the first millennium. They are characterized as a dialect continuum.
Turkic languages are spoken by some 200 million people. The Turkic language with the greatest number of speakers is Turkish, spoken mainly in Anatolia and the Balkans; its native speakers account for about 38% of all Turkic speakers, followed by Uzbek.
Characteristic features such as vowel harmony, agglutination, subject-object-verb order, and lack of grammatical gender, are almost universal within the Turkic family.
There is a high degree of mutual intelligibility, upon moderate exposure, among the various Oghuz languages, which include Turkish, Azerbaijani, Turkmen, Qashqai, Chaharmahali Turkic, Gagauz, and Balkan Gagauz Turkish, as well as Oghuz-influenced Crimean Tatar. Other Turkic languages demonstrate varying amounts of mutual intelligibility within their subgroups as well. Although methods of classification vary, the Turkic languages are usually considered to be divided into two branches: Oghur, the only surviving member of which is Chuvash, and Common Turkic, which includes all other Turkic languages.
Turkic languages show many similarities with the Mongolic, Tungusic, Koreanic, and Japonic languages. These similarities have led some linguists (including Talât Tekin) to propose an Altaic language family, though this proposal is widely rejected by Western historical linguists. Similarities with the Uralic languages even caused these families to be regarded as one for a long time under the Ural-Altaic hypothesis.