ǃXóõ

The ǃXóõ language is spoken by widely scattered groups of San living in southwestern Botswana and a small area of eastern Namibia.

1985, Anthony Traill, Phonetic and Phonological Studies of ǃXÓÕ Bushman, page 1

[…] which studied category formation of ǃXóõ clicks by speakers of a language that has no clicks (American English) and two other unrelated African languages that have clicks, but fewer of them […]

2008, Keith Elwin Johnson, Second Language Acquisition of the Spanish Multiple Vibrant Consonant, page 49

However, the phonotactic patterning of 'uvular' clicks in ǃXóõ does not comply with the predicted patterns given in this analysis.

2010, “Amana L. Miller, Tongue body and tongue root shape differences in Nǀuu clicks correlate with phonotactic patterns”, in Turbulent Sounds: An Interdisciplinary Guide, page 258

Speakers of ǃXóõ (also known as Taa), gathered together for a storytelling competition at Pos 17, Namibia […]

2011, Nicholas Evans, Dying Words: Endangered Languages and What They Have to Tell Us, page 53

The most phonologically diverse language may be ǃXóõ, spoken by about 4,000 people in Botswana and Namibia, which has somewhere between 84 and 159 consonants.

2011, Michael C. Corballis, The Recursive Mind: The Origins of Human Language, Thought, and Civilization, page 76