And then they bragged about a new machine-learning improved keyboard and it went downhill. First, all keyboards became monolingual, which was a 10-years regression. And even in that language, it was very flakey. They added multi-language keyboards somewhat recently and it got slightly better, except that for some reason it changes the keyboard back to the English-only one regularly for no reason I can see.
It is maddening. For a couple of years it was fantastic.
And contrary to the iPhone you can’t even disable autocorrect! This + the super-aggressive autocorrect of watchOS (the screen is small after all so you are likely to make a mistake and we better fix it automatically!) makes it an absolute NIGHTMARE to type on an Apple Watch in multiple languages. Your only option is to use speech to type because that one for some reason works when you change the language whereas the keyboard doesn’t care.
Edit: the language switch bug on watchOS seems to have finally been fixed on watchOS 26.1. The bug was already long present on watchOS 11, so not something that watchOS 26 introduced.
I can't stand keyboards that do this - especially those that don't let you turn it off. If you write in another language that doesn't use the Latin alphabet, you end up with nonsense suggestions - common English words like "the" or "and" will get replaced with obscure words in another language that just happen to sound vaguely phonetically similar. I almost never switch languages mid-sentence when typing, and yet the keyboard can't seem to grasp that.
That said, it got bought by Microsoft and now they try to cram in some AI nonsense :(