Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
There are 6,000 speakers (according to Nguetse Mezatio Tsague in 2003) in the Eastern Region, in the communes of Diang and Belabo in Lom-et-Djerem department.
References
Bebil at Ethnologue (18th ed., 2015) (subscription required)
Binam Bikoi, Charles, ed. (2012). Atlas linguistique du Cameroun (ALCAM) [Linguistic Atlas of Cameroon]. Atlas linguistique de l'Afrique centrale (ALAC) (in French). Vol. 1: Inventaire des langues. Yaoundé: CERDOTOLA. ISBN9789956796069.