Uh, there is only one true morse code, and it doesn't include japanese, umlaute, or even an exlemation point.

And I say not that because of standards-worship, but because morse code is what it is by international treaty, and (at least as I understand it), if you don't know that, you can't use the approprate bands. IOW, if you send "überrhacking" in morse over a frequency where morse or voice is allowed, you're in violation of the treaty, since that isn't morse. Similarly, if, on your code test, you are asked to encode "übergeschloss", the correct answer is "it can't be done in morse", or morse("uebergeschloss").