The sixty or so Kainji languages are spoken by about 900 000 people in Nigeria. Four of the largest are Tsuvadi (150 000), Cishingini and Tsishingini (100 000 each)—all from the Kambari

Kambari languages

The Kambari languages of the Nigerian plateau are:*Cipu *Vadi*Shingini*Baangi*Kakihum*Kimba...

 branch; and Clela (= C'lela, Lela) (100 000), of the Duka branch.

The primary division of the family is into eastern and western clades. The eastern branch has not been well reconstructed. According to Ethnologue

Ethnologue

Ethnologue: Languages of the World is a web and print publication of SIL International , a Christian linguistic service organization, which studies lesser-known languages, to provide the speakers with Bibles in their native language and support their efforts in language development.The Ethnologue...

(2009),http://www.ethnologue.com/show_family.asp?subid=2033-16 the constituent branches are:
At the time of the British conquest, several of these languages were in the process of shifting from duodecimal

Duodecimal

The duodecimal system is a positional notation numeral system using twelve as its base. In this system, the number ten may be written as 'A', 'T' or 'X', and the number eleven as 'B' or 'E'...

 to decimal systems. These include Janji (Jera), Kahugu and Gure (Gbiri–Niragu, Kauru), and Piti.

The western clade has been better researched. Both it and its subbranches have been partially reconstructed. The structure of the family (Blench 1988, reproduced in Heine & Nurse 2000) is as follows; the named branches have reconstructions:
* This branch (less a couple of the Pongu languages) is traditionally called Kamuku, but was not reconstructed by Blench.