Chagatai language
The Turkic Chagatai language served as the high register literary standard for Central Asian Turkic peoples, while the vernacular low register languages were the Uzbek language and Eastern Turki (Modern Uyghur). The Soviet Union abolished Chagatai as the literary standard and had the Uzbek language standardized as a literary language for, and the Taranchi dialect of Ili was chosen as the literary standard for Modern Uyghur, while other dialects like the Kashgar and Turpan dialects continue to be spoken.