Google's keyboard is okay for English. It's a complete tire fire for two other languages I use (both popular and with a very large training data set).

Suggests words that make no sense, preferring rare words to much more widely used and obvious matching picks. Has the vocabulary of a poorly educated five year old idiot savant — fails to complete many words you use fifty times a day, but sometimes surprises you by suggesting something you'd hear a couple times per decade. Doesn't know other forms of the same word, forcing you to correct it manually over and over again, often failing to remember the word until you type it in four or five times.

Yes, I've downloaded all the dictionaries, tried it on many phones, and my friends are of the same opinion: it really is just bad.

I write in English and Spanish on it, and it seems the shittiness gets multiplied when you use a bilingual instead on monolingual layout. I've tried switching languages manually, but that sucks even more when writing Spanish with English technical terms sprinkled.

This is a patent case where IA made a function worse instead of better, yet companies clinged to it for some reason.