The Leko–Nimbari or Chamba–Mumuye languages are a subgroup of the old Adamawa languages family (G2, G4, G5, G12), provisionally now a branch of the Savanna languages. They are spoken in northern Cameroon and eastern Nigeria.

• The four Leko languages include Chamba Leko of the Chamba people, with about 60,000 speakers.
• The dozen Duru languages include Vere, with over 100,000 speakers.
• The dozen Mumuye–Yendang languages include Mumuye, with half a million speakers, and Yendang, with perhaps 100,000.
• Nimbari, with only a hundred speakers, forms its own branch.