The patch often includes fixes for game-breaking bugs present in the original Japanese Wii release. 💿 How to Get and Play the English Patched ISO
Because Graces f was the version localized for the West, English assets technically existed (scripts, voice lines, menus). This created a unique opportunity for modders: rather than translating from scratch, they could "backport" the official translation into the original Wii ISO.
Use a tool like with a community-made .xdelta patch file.