By the way, there's a feature I've been wanting for years, but it will likely never be implemented: selectively disable autocorrect only for a certain language/keyboard.
I have friends in 3 language regions: English, Italian and German. Autocorrect works "fine" for English and Italian, but for the German part I use the Swiss dialect of German (Schwiizerdütsch), for which there is no autocorrect. For me it's a real pain, because I can turn autocorrect on or off completely (system-wide), but not by language.
It's very useful in Italian and English, but when I switch to Swiss German, I need to basically "tap away" every autocorrect suggestion that comes up, making typing way slower.
I didn't find a way so far to have a language/keyboard with no autocorrect. I wish Apple implemented that.