What about those African languages made up of all clicking sounds?
By calling it a universal word, I guess I thought they were referring to the concept of linguistic universals , which are interesting since they might suggest something about the deeper way in which our brains work. To make a claim about linguistic universals like that I really think they should study more than 10 (31) languages.
According to this page , 44% of people speak an Indo-European language, and 96% speak a member of one of the top 10 language families. The remaining 4% includes 84 language families. I imagine there's a ton of variety there, and for understanding human language and cognition they all probably have just as much value as the larger language families.
I am unaware of any African language, or any language in general, that only uses clicking sounds. Which one are you thinking of?
I've been trying to recall where I heard a "pure clicking" language, I've a feeling it was a bushmen docu from Botswana - and it might just be that the hunters used words that only required clicks, or I misheard, etc..
Anyway, http://listverse.com/2018/08/10/10-extraordinary-languages-t... and https://www.britannica.com/topic/click-languages mention Damin, which sounds (no pun intended!) like it might have been mainly composed of clicking sounds?
Perhaps what I heard was slang/dialect tailored to the activity, which IIRC was hunting.