Oh, a minor diversion from the usual political economy stuff that goes up here.
This is triggered by an article in last week’s The Economist on the nearly dead San language, Nluu. It has only two living fully fluent speakers alive, both in their 80s. The San languages are among the world’s most ancient, although arguably reflecting a simpler world than the one we live in, although certainly with many complications we know nothing of. But the point that caught my attention was that it has 45 distinct click sounds, along with 114 basic sound units. It is one of only three languages in the world (all of them San) that have something called the double lip-full kiss click, whatever that is. I only know that if one sees an exclamation point that means some sort of click. So probably the most numerous living San group are the !Kung, yeah, some sort of click on the front end of that name.
I have known about this matter of clicks in southern African languages for some time but had no idea there were so many different ones. Not only the San languages but also the Khoechan (or Khoi khoi) languages have lots of them. Some clicks can also be found in the much more widespread Xhosa languages, one of which was the mother tongue of Nelson Mandela, who almost certainly had some Khoi or San ancestry. But beyond these languages, I am not aware of any others that have any clicks. They have disappeared in later languages, and I am unaware of any other language having anywhere near the number of basic sound units that apparently this nearly extinct Nluu language has.