Timed practice and special characters
I really like the timed practices, but I find them difficult in languages with a lot of special characters like Portuguese. I have to deliberately ignore accent marks in order to type quickly enough to get the answers in before the clock runs out. Any way to make it easier to type special characters quickly? Forget doing it on a smart phone! Impossible.
You could try doing it on a computer with your keyboard set to the language you're learning. That would be good practice either way if you ever want to be able to type in that language.