Old thread, but whatever.
I have the same issue, because my keyboard is a Finnish (multilingual) one, meaning it's got å, ä and ö, which don't exist in English keyboards. It's been a pain to find out how to write various common characters (", ' and ?, for example) to use in MW save file naming. Changing the keyboard layout would be an easy solution, but then I'd had to change it back and forth.
It can't possibly hurt to be able to use both layouts, though.