Just a tip: If you can't type an umlaut, you can use ae for ä, oe for ö, ue for ü, that way words don't get a different meaning (that's also how crosswords do it for example).
Just a tip: If you can't type an umlaut, you can use ae for ä, oe for ö, ue for ü, that way words don't get a different meaning (that's also how crosswords do it for example).