Yunnan Province, Eshan, Xinping, Shiping (North), Yimen, Yuxi, Jiangchuan, Shuangbai, Jinning, Chengjiang, and northern Yuanjiang counties.
Nasu, Nisu. Nasu dialect is distinct from the Nasu language continuum located further north.
The language is active in areas with high concentrations of Nisu. However, there is increasing borrowing of lexical items from Chinese. Code switching between Nisu and Chinese is common. Many men and women spend part of the year working in predominantly Chinese towns or cities. Home, village, work. Mainly adults. Neutral attitudes. Also use Chinese [cmn] or Eastern Nisu [nos].
Officially classified within Yi nationality.