I would say English is far more tolerant of "mistakes" then any other language. So much so that it changes radically over a short period of time. By mistakes,

I would say English is far more tolerant of "mistakes" then any other language. So much so that it changes radically over a short period of time. By mistakes, I mean mispronunciations, using the wrong words, or made up words or words from other languages. As long as there is some sort of context that the meaning gets across, in the "mainstream" it is acceptable. This then flows on to more formal writing. In that sense I think it has become a very flexible and international language. I would think of French as the polar opposite. No idea about spanish (it seems a bit flexible). Japanese was strict, but these days they seem to like throwing in all sorts of words (as long as they can mangle it with katakana then they will say it - at least the kids will).