It's a nightmare if you're writing in two different languages at the same time, eg. French sentence with English words in it. I often have to disable one or the other and live with most words being red underlined, because autocorrects are just not great at guessing what language I'm using.
BTW, if anyone from Alexa, Apple or Google is reading this, please have someone work on this. It's been 10 years since I've been using it, and neither speech recognition, nor autocorrect have made any kind of progress on the dual language stack.
Google has multiple language mode which works with Google keyboard and Chrome. I type in English and French on the regular at it auto corrects each properly even when mixed (Google keyboard on Android will even complete suggestions properly when mixing languages).
I use the same, it's mostly okay except when I mistype an English word that happens to be a word in French and the keyboard decides to correct the next few words to French.
Also amusing is that autocorrect, even while in English mode, suggests the bear emoji when I type "ours" or the cat when I type "chat".
BTW, if anyone from Alexa, Apple or Google is reading this, please have someone work on this. It's been 10 years since I've been using it, and neither speech recognition, nor autocorrect have made any kind of progress on the dual language stack.