Maybe some people who know Japanese could already start by roughly translating some text, so that we can insert it into the ROM as soon as we know where the text is located inside the ROM's
I'm completely new to hacking and stuff, but it is possible to extract the extensionless files in the 0 - 9 folders of the ROM with NDSeditor
I hope someone can put that to use
BTW it outputs .nclr and .ncgr files from 0/0/5 file