Does anybody know if any of the language trees on this website contain words that utilize click consonants? If you are not familiar, here is a good example: https://www.youtube.com/watch?v=W6WO5XabD-s. I've always been fascinated by theses types of languages and wondered if instances of such pronunciation occur outside of indigenous populations. This skill is similar to the Spanish 'rolling' of the R consonant - which many people find difficult- so I wonder if clicks are difficult for non-native speakers as well.
The Bantu languages borrowed all their clicks from the Khoisan languages. I certainly heard far more frequent clicks in that video than I ever have listening to people speaking Zulu.
FIO OP: I believe the only click sounds known outside of Africa and of non-Khoisan origin occur in an obsolescent Australian aboriginal ritual language; I can't recall its name at the moment, but it is quite famous in linguistic circles.