It's pretty hard for the shortcuts to be consistent and localized. Especially if you also use different keyboard layouts when you're using different languages...
Even for keys that aren't mnemonic, do you want undo to be ctrl + z or ctrl + the key closest to left shift?
> It's pretty hard for the shortcuts to be consistent and localized. Especially if you also use different keyboard layouts when you're using different languages...
Hence my original comment. I haven't had a problem with different keyboard layouts, since most of the keys that change are on the outer edge, nowhere near where the most common shortcuts are located (then again, I rarely type using QWERTZ).
> Even for keys that aren't mnemonic, do you want undo to be ctrl + z or ctrl + the key closest to left shift?
CTRL+Z, since that's what it's been since time immemorial, even on ISO keyboards. Consistency is king.
Japanese keyboards also have Latin labels, so it's at least possible to put two and two together there, although it would probably be better to write '終了 (た)' (unless there are local conventions to the contrary).
Effectively nobody in Japan uses or even knows the kana keyboard layout though, only QWERTY. My comment was more that they may not know the word "quit" for the Q to be meaningful to them... not that they can't find it on the keyboard.
Similarly as an English speaker I would be quite confused if the shortcut key for exit was a totally different letter like P or something.
Even for keys that aren't mnemonic, do you want undo to be ctrl + z or ctrl + the key closest to left shift?