The | and \ keys are different places on Norwegian and Danish keyboards.
Do Danish people not pipe their standard output as much? Do Swiss people not write emails as much? Are Europeans bad at finding the return key, thus requiring a larger one than Americans? These are all things I've actually come across.
Why are the special characters in all sorts of weird places? One of the great mysteries of life.
Also why miss such useful symbols as ¤ ½ § from layout?
Going back and forth between " and @ being capital-2 daily is probably the one that's caused me the most frustration.