abstract:Chagatai (جغتای JaġatāyUzbek: چەغەتاي Chag'atoy; Mongolian: ᠲᠰᠠᠭᠠᠳᠠᠢ Chagadai; Uyghur: چاغاتاي Chāghātāy; Turkish: Çağatayca) is an extinct Turkic language which was once widely spoken in Central Asia, and remained the shared literary language there until the early 20th century. It was also spoken by the early Mughal rulers in the Indian subcontinent, where it influenced the development of Hindustani.