240 in China (Xu Shixuan 2005). No monolinguals. Ethnic population: 240.
Southwest Yunnan Province, Xishuangbanna Dai autonomous prefecture, Menghai county, Mengzhe township, Manghong village cluster, one village: Laopinzhai. Also in Thailand.
SVO; simple syllable structure; certain obstruent onsets may be prenasalized, aspirated, or palatalized, but otherwise no consonant clusters; syllables may be closed by stop or nasal; 3 tones, tone sandhi; words have 1 or 2 syllables; modifiers follow heads; loanwords from Dai and Chinese
Some officially classified within Hani nationality, others officially classified as Undetermined Nationality. Some view Bisu as an important link to their culture and hope to preserve it. Traditional religion.