Old Uyghur was a Turkic language which was spoken in Qocho from the 9th–14th centuries as well as in Gansu.
Uyghur inscription on the east interior wall of the Cloud Platform at Juyong Pass.
Uyghur inscription on the west interior wall of the Cloud Platform at Juyong Pass.
The Turkic languages are a language family of more than 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.
Old Turkic Kul-chur inscription with the Old Turkic alphabet (c. 8th century). Töv Province, Mongolia
The 10th-century Irk Bitig ("Book of Divination") from Dunhuang, written in Old Uyghur language with the Orkhon script, is an important literary source for early Turko-Mongol mythology.
Yuan dynasty Buddhist inscription written in Old Uyghur language with Old Uyghur alphabet on the east wall of the Cloud Platform at Juyong Pass
