Please do not forget the Bantu and Xhosa languages which use clicking sounds.
Though how one transcribes those is beyond me. Suppose one would have to peruse their vast body of literature to find out.
I believe characters like the exclamation point are used to represent the click sounds in these languages. They seem to have originated with the San (Bushman) and Hottentot people (so-called Khoisan languages) and some neighboring languages like Xhosa picked up some of the sounds.
I believe characters like the exclamation point are used to represent the click sounds in these languages. They seem to have originated with the San (Bushman) and Hottentot people (so-called Khoisan languages) and some neighboring languages like Xhosa picked up some of the sounds.