 Autonyms include ' (alternatively '), ' (including ', ', and '), ', and '.In his description of the Yi script (not the spoken language) Huáng Jiànmíng (1993) holds that the Nasu variety of Yi script is used by the groups speaking languages of the Nasu language cluster of Northern Yi in south-eastern Sìchuān, eastern Yúnnán, Gùizhōu, as well as in Guǎngxī.He distinguishes two sub-groups.