An extensive lexical survey of the South Bauchi languages had been carried out by Kiyoshi Shimizu from 1974 to 1975.

[5] Below is a comprehensive list of South Bauchi language names, populations, and locations from Blench (2019).

They also generally have the lateral fricatives /ɬ, ɮ/, whereas the West Chadic A languages have not preserved such consonants.

[4] Blench (2020) proposes that Proto-South Bauchi had a 6-vowel system consisting of /i, ɨ, u, ɛ, ɔ, a/, with length contrast.

[4] Like the neighbouring A3 West Chadic languages but unlike Hausa, South Bauchi languages do not usually have plural nouns, although certain words for persons such as ‘woman’, ‘child’, and sometimes ‘man/person’ have suppletive nominal forms.