I know there isn't a smiley for 'tongue-in-cheek' but I thought it was obvious that that was how the start of my original post was phrased. Obviously not.
It wasn't a post about 'foreigner-bashing'. But the facts are because of the 19th century British Empire and 20th century American cultural hegemony, English is the closest thing to a 'world' language. So for saftey reasons and no other, should be the only language for international ATC comms.
As it happens, I do speak another language fluently - Dutch. The reason I don't post on this international BB in it, is because 99.5% of the readers wouldn't have a clue what I was saying.
Vive la difference and vliegen lekker!