Arabic

Fulfulde

Hausa

Yoruba

[add others]

-with French suppressing slave trade relatively earlier than OTL, more expansion southwards

-and with less intense colonialism, Sokoto is able to grab most of Yoruba lands

-with OTL Nigeria much less colonized

-eventually (in 1930s?) has a military coup which makes it egalitarian republic

-with caliph placed outside government

-Arabic and Fulfulde in weird symbiosis as official languages