Mbukushu is one of several Bantu languages of the Okavango which have click consonants. Mbukushu has three: tenuisc, voiced gc, and nasalized nc, as well as prenasalized ngc, which vary between speakers as dental, palatal, and postalveolar(The Bantu Languages, 2003:37). It also has a nasal glottal approximant.
References
^"Mbukushu". Ethnologue. Retrieved 15 August 2018.
^Simons, Gary F. and Charles D. Fennig (eds.). 2018. Ethnologue: Languages of the World, Twenty-first edition. Dallas, Texas: SIL International. Online version: http://www.ethnologue.com.