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Here is Wikipedia’s (WICKED-PEDIA) article on Bamiléké languages where they form a linguistic classification group Western/Eastern Bamileke of the Eastern Grassfields branch.
Wikipedia states
“The Bamileke languages (Bamileke languages: Bamiléké) are a group of Eastern Grassfields languages spoken by the Bamileke people in the Western High Plateau of Cameroon. The languages, which might constitute two branches of Eastern Grassfields, are:
Western Bamileke: Mengaka (Məgaka), Ngombale, Ngomba (Nguemba or Ngemba)[1][2], the “Bamboutos” dialect cluster of Yɛmba, Ngyɛmbɔɔŋ, Mmuock and Ŋwe Eastern Bamileke: Fe’fe’, Ghɔmálá’, Kwa’, Nda’nda’, Mədʉmba.” (Source: https://en.wikipedia.org/wiki/Bamileke_languages)
As you observe clearly that it has a question mark (?) on the linguistic classification of these languages. It is already known in historical linguistics that the Niger-Congo classification as a whole is actually unscientific and problematic. I have compared already hundreds of Bamileke Medumba basic vocabulary with Medew Neter (Classical Kemet) and established numerous sound regularity. I will be finished this project sometime in the future. Before a historical linguistic study can be demonstrated, the phonology and morphology of these Black Afrikan Bamileke languages must be studied.