699,000 in Viet Nam (2002 SIL). Total users in all countries: 762,700.
North, along Red and Black rivers, Son La, Dien Bien, Yen Bai, Lai Chau, Lao Cai, and Phu Tho provinces; south, Lam Dong province, Tung Nghia; Dac Lak province, Tho Thanh; Gia Lai province, Pleiku; elsewhere.
5 (Developing). Language of recognized ethnic group: Thai.