And anyway, there's no keyboard on earth who can handle multi-language typing in a sane way. They either mash all languages together, or force random layouts on you, or... I stuck with GBoard because I just hate it less than others, so when I found this topic I thought yay let's try - until I read it's only for English. So there.
I really like how gboard handles it. It figures out what language I'm typing from the first couple of words and prioritises those. This way I can even mix languages within the same sentence and it will still recommend the right ones. It's really really good.
Are you sure, like really sure you mean gboard? In my gboard I choose the language I want to type in, and that's the language for everything (settings, typing, recommendations...).