6,000,000 in Thailand (1983 SIL). Population total all countries: 6,029,500.
Chiang Mai, Chiang Rai, Lamphun, Lampang, Mae Hong Son, Sukhothai, Nan, Phayao, Phrae, Uttaradit, Tak, and Kamphaeng Phet provinces.
5 (Developing). De facto language of provincial identity in northern provinces.
Bandu, Nan, Tai Wang. Nan dialect is more distinct.
Yuan is their term for Vietnamese. The name ‘Phyap’ (Phayap) is Sanskrit, north. Buddhist.