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.
Mboi (Mboire, Mboyi) is an Adamawa language of Nigeria. Its name is that of one of its dialects, the other two being Banga and Handa. These are rather divergent, Blench (2004) considers them to be distinct languages.
Blench (2019) lists Gana, Banga, and Haanda as language varieties that are part of the Mboi cluster.
References
Mboi at Ethnologue (18th ed., 2015) (subscription required)
Blench, Roger (2019). An Atlas of Nigerian Languages (4th ed.). Cambridge: Kay Williamson Educational Foundation.