Yambeta or Nigi is a

Southern Bantoid Southern Bantoid (or South Bantoid) is a branch of the Bantoid language family. It consists of the Bantu languages along with several small branches and isolates of eastern Nigeria and west-central Cameroon (though the affiliation of some branch ...

language of

Cameroon Cameroon, officially the Republic of Cameroon, is a country in Central Africa. It shares boundaries with Nigeria to the west and north, Chad to the northeast, the Central African Republic to the east, and Equatorial Guinea, Gabon, and the R ...

Phonology

There are 20 contrastive consonants in Yambeta. The glottal stop occurs only in word-final position and is elided intervocalically. All other consonants, except /t͡ʃ/ and /w/ as well as the prenasalized stops, may be word-final. All stops are voiceless word-initial and word-final, and voiced intervocalically or following a nasal. There are two vowel sets in Yambeta. The most common noun syllable structure is CVC.Boyd, V. L. (2015).
The phonological systems of the Mbam languages of Cameroon with a focus on vowels and vowel harmony
' (pp. XVIII+-394). Utrecht: LOT.

References

Mbam languages Languages of Cameroon {{Mbam-lang-stub