Fun, but I don’t love the Polish word selection because a lot of these are supposed to contain special characters and they’re not actual real Polish words without them.
Like blad - that’s not a word. Błąd is a word, it means a mistake. So does this count or no? Or kal vs kał, one is a word (means feces) and one is just some letters.
In Poland we use standard qwerty keyboards with Polish keyboard layout set (called Polish Programmers), you press alt+character to get the special version (like alt+s gives you ś, alt+a gives you ą and so on, the only nonintuitive one is alt+x which is ź, because alt+z is taken by ż). Combine with shift or caps lock for capital versions. No issues.