If your using an emulator on your PC that requires a bios (i.e. espxe or pcsx2) then you just need to download the bios version for that country and use it instead.

If your using an emulator for the SNES or something along those lines it should just work for you without having to change any settings.

If your on an actual console I'm not sure, but I'm sure someone else will be able to answer your question.