hdishs if you're using a truly randomly generated diceware password with enough words, I don't think using another language is really going to help in practice since the password is already virtually impossible to crack, especially if you rely on the secure element.
It also depends on how the password is written. Like if your favorite fruit is apples, having a password that's just "apple" but in 4-5 different languages wouldn't be a good password, for example.
Also, it's important that you can actually remember the password. If you use words in a language you're not familiar with, you may forget the word or mix up the spelling, which would mean you can't log in again. But, yes, technically adding more words from other languages would technically make the password harder to crack, but not that much harder if you're already picking randomly from a pool of thousands of words. Making the password longer, i.e. adding more words, would make the password even harder to crack.
I'd suggest reading through this site to see more info about this: https://diceware.dmuth.org/