イボ語
Comparing Izi, Ezaa, and Ikwo reveals that these dialects share about 95% of their vocabulary. However, comparisons with the Central Igbo language showed only an 80% consistency in lexical items. Since Izi, Ezaa, and Ikwo are mutually intelligible with each other but not with Central Igbo, they are classified as one language separate from the Central Igbo language. However, some of the words in Izi are cognates of Central Igbo.