L1 users: 1,000 (Li 2006).
Yunnan province: Xishuangbanna Dai autonomous prefecture, Jinghong and Mengla counties, 5 villages, including Nahuopa village in Mengyang township.
Possibly a dialect of U [uuu]. 76% similar lexically with U of Shuangjiang County.
Officially classified as Undetermined Nationality. Traditional religion.