4,650 all Mewahang (2011 census). Almost no monolinguals. Ethnic population: 1,580 (2011 census).
Kosi zone: Sankhuwasabha district, Choyang, Mangtewa, and Yaphu VDCs; upper Arun valley. Sunsari district, Bhaludhunga and Bishnupaduka VDC (Sunsari dialect); Mangtewa VDC (Dibum dialect); Yaphu VDC (Mulgaon-Wangtang dialect).
6b (Threatened). Language of recognized indigenous nationality: Rai.
Sunsari, Dibum (Dibung), 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.