Kalabari-Ijo (hereafter, Kalabari) is one of the four lects of the KOIN group of East Ijo of the Ijo
language cluster in the Niger-Congo phylum (Williamson & Blench 2000: 22). The other lects in this group
are Kirike (Okrika), Ibani and Nkoroo. Kirike and Ibani are mutually intelligible with Kalabari, and
Nkoroo is partially so. All the lects in this group are spoken in Rivers State, Nigeria. In addition, there are
three other groups of Ijo: Nembe-Akaha (Akassa) in East Ijo, Inland Ijo (Oruma, Akita (Okordia), Biseni) and
Izon, which together make up West Ijo. These groups are all spoken in Bayelsa State, Nigeria, with
Izon spreading further to the west (Williamson, p.c.).