L1 users: 1,850 (Good et al 2011).
North West region: Menchum division, Wum subdivision, Bentsan, Bijun, Biya, Nsun, and Uba villages.
Missong (Bimia Bidjul), Biya (Za’), Munken, Ngun (Nsong), Abar (Ignew Aba). Missong is divergent from the other four dialects as far as mutual intelligibility is concerned.
Mungbam is an acronym made up of the initial syllables of the 5 villages where the language is spoken. No actual autonymn for the language.