how do i change 'Kirby Epic Yarn' the Japanese version. to have English font?

[Admentus]

Try extracting the disc through Dolphin first. You get a file list of just files, which you can browse through on a regular Windows PC. You can try and see if you can find the audio files that way from both extracted discs. In which case it's just a matter of copy-and-paste. You don't need to rebuild the disc perse, since Dolphin can run GC/Wii games in their extracted file list format as well.