4,650 all Mewahang (2011 census). Almost no monolinguals. Ethnic population: 3,000.
Kosi Zone, Sankhuwasabha district, Mangtewa, Yaphu, and Choyang VDCs; upper Arun valley east of the river. Sunsari dialect: Sunsari district, Bhaludhunga and Bishnupaduka VDC; Dibum (Dibung) dialect: Mangtewa VDC; Mulgaon-Wangtang dialect: Yaphu VDC.
6b (Threatened). Language of recognized indigenous nationality: Rai.
Sunsari, Dibum, Mulgaon-Wangtang. Structurally different from Western Mewahang [raf].
SOV; postpositions; noun head final; verbal affixation marks person and number; tense and aspect.
Devanagari script [Deva].
The language is regarded as a dialect of Western Mewahang [raf]. Traditional religion, Hindu.