i did eventually figure this out.
i extracted the romfs folder of an English CIA file of SMT IV and was able to get the Japanese cartridge translated using Luma's LayeredFS.
i'm expecting a few Japanese 3DS game cartridges for some games i have installed on my system in English. i have another 3DS system i would like to play these games on, hence the need for the cartridges to carry over my progress.
i was wondering...
Ah, yes, portrait mode, surely the best way to film a row of people. If only there were some way to fit a wider shot, at the expense of height... if only...