Igbo (not Ibo) is a language spoken in Nigeria by the Igbo people (Ndi Igbo). It is written in the Roman script and is a tonal language like Yoruba and Chinese, with two distinctive tones; high and low.
Reading and writing Igbo is not very widespread and not much Igbo literature exists. Igbo is mainly a spoken and colloquial language today, The first book in Igbo, Isoama-Igbo a primer, was produced in 1857 by Samuel Ajayi Crowther.
There are numerous Igbo dialects, some of which are not mutually intelligible. The many dialects have not helped the desired emergence of a single spoken or written Igbo.