I don't get it. In Poland we use exclusively US keyboard layout. To type Polish characters we have key combinations with AltGr (as TFA explained in a lot of detail).
Some people are more accustomed with composing letters + accents instead of using key combinations with AltGr
Coming from Windows this is very common
Some people are more accustomed with composing letters + accents instead of using key combinations with AltGr
Coming from Windows this is very common