it would depend on how magnius decides to make the patch.
he could create the patch using the already patched rom as a clean rom or use the original rom.
my guess is that either way the .sav should still work as long as it's called the same thing.
i agree but magnius and kazowar have different ideas for the translation.
kazowar only wants to translate the necessaries, magnius wants to translate everything
go to the create tab on xdelta.exe
add the clean japanese rom (original)
add the translated rom (new)
click create and wait
i think...
edit: xdelta GUI.exe