I switch between languages all the time too. Mostly, I just type whichever language I want, and the keyboard figures out it’s one of the two I use frequently an

I switch between languages all the time too. Mostly, I just type whichever language I want, and the keyboard figures out it’s one of the two I use frequently and doesn’t bother me. Failing that, there’s a button next to the dictation button to change languages if autocomplete is acting up (this whole post was written with the keyboard set to Portuguese with only one miscorrection thus far). You don’t need to change the whole OS’s language to type in multiple languages!