Mono is a language spoken by about 65,000 people in the northwestern corner of the Democratic Republic of the Congo. It is one of the Banda languages, a subbranch of the Ubangian branch of the Niger–Congo languages. It has five dialects: Bili, Bubanda, Mpaka, Galaba, and Kaga. Mono has 33 consonant phonemes, including three labial-velar stops (/k͡p/, /ɡ͡b/, and prenasalized /ᵑ͡ᵐɡ͡b/), an asymmetrical eight-vowel system, and a labiodental flap /ⱱ/ (allophonically a bilabial flap [ⱳ]) that contrasts with both /v/ and /w/. It is a tonal language.