Wii scrubber can indeed extract files. You usually have to prime it with the public keys and from there it should be fairly obvious.I didn't actually realize until recently that the proper term I should have been using is "rebuilding". I can extract the files with Dolphin, I just can't put it back together. Apparently wit also doesn't work with gamecube isos? I haven't tried it yet, that's just what I've read elsewhere.
That said most people will probably point you at https://wit.wiimm.de/ if you have aspirations towards a full translation rather than pulling a file or two to look at.