L1 users: 2,660 (1999 census). Ethnic population: 3,700 (2009 census). Total users in all countries: 3,165.
Lai Chau province, Muong Te and Sin Ho districts, triangle-shaped area between Song Da (Black River) and the Nam Na: Nam Nghe, Nam Xung, Nam Ban, Ban Nam Voi, and other communities.
6b (Threatened). Language of recognized ethnic group: Mang.