How to input in different languages?

I think i can use getchar to get the keys that have been presed, but how can i do to input in different languages?, for example in japanese?, thankyou.

I use GetChar() on a name entry dialog and it works with Unicode characters (I think). For example I changed my keymap to Russian and was able to enter Syrillic characters into the name entry dialog (I also had a font which supported those characters). So in theory it should also work for Japanese but I've never tried it. Anyone else got more info?