Sazanamistyle: In any case, I'd be willing to try whatever the Vista workaround is if someone wants a game translated. I imagine it's something maybe I could do with an alternate user account.
bansama: I also use Applocale when I need to run some stuff through Steam which won't run on Japanese OSes. I expect there's a Vista version of that, or at least a workaround to install it (which is what is needed to install on Win 7).
If you go that route, remember to use Uz'bek as the region choice for anything you want in English. At least, that's the only selection that works with Steam. Trying English likely won't have any effect.
Thanks for all your suggestions! I'll keep that in mind if the opportunity to translate something ever comes up. I don't use Steam because it's atrociously localized for Japanese users and the only DRM we're used to over here having the CD/DVD to play the game (and publishers release no CD/DVD patches if there is a demand for them), so if I did ever buy the English version of RPG Maker for translation purposes, it'd have to be at Humble Bundle or some place. Humble doesn't connect to Steam, right?
I wonder though, if this is all necessary. After all, the Japanese version of RPG Maker can display English characters, as can any Japanese game, because the English alphabet is a small part of Japanese now. If I ask around there might be a way to do it that way too!
BTW, are you and I the only users from Japan on the forum? I like your Miku avatar!