<P> Hausa is a highly atypical Chadic language, with a reduced tonal system and a phonology influenced by Arabic . Other well - known Chadic languages include Ngas, Goemai, Mwaghavul, Bole, Ngizim, Bade and Bachama . In the East of Nigeria and on into Cameroun are the Central Chadic languages, such as Bura, the Higi cluster and Marghi . These are highly diverse and remain very poorly described . Many Chadic languages are severely threatened; recent searches by Bernard Caron for Southern Bauchi languages show that even some of those recorded in the 1970s have disappeared . However, unknown Chadic languages are still being reported, witness the recent description of Dyarim . </P> <P> Hausa, as well as other Afroasiatic languages like Bade (another West Chadic language spoken in Yobe State), have historically been written in a modified Arabic script known as ajami, however, the modern official orthography is now a romanization known as boko first introduced by the British regime in the 1930s . </P>

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