I think it has been mentioned in the forums or somesuch that some stuff like the command lists being untranslated is a bug that will be patched. Even if that was not the case, this is a useful resource that includes descriptions of character abilities and their moves. The command lists being untranslated is not as much of a problem as it might seem, anyway - the list does not include descriptions of what the special moves do, only their names and inputs. The directional inputs are shown as a picture so it isn’t something that needs translation. The attack buttons used are shown with kanji for light, medium and heavy attacks, but most special moves can be used with any of them with slightly different effects, so the only time them not being translated could be a problem is when a move requires only a specific button (or button combination), but finding out which button that is is not difficult as you can either cross-reference the kanji with the commands that use any of them, or simply try out the three options to find which one it is.
Oh, and I guess some moves require you to be airborne, so that’s another thing that you might miss if you can’t read any kanji, but you can always just try inputs while jumping if it doesn’t seem to work on ground. It’s a bit inconvenient, but not a huge issue, I think. Also worth knowing is that the upmost section is for moves that don’t cost any SP to use (though you can use SP to use a boosted version of them by pressing light and medium at the same time as your attack input), the lower section with one or two moves is for moves that cost SP to use, and the last item in the list is the metaworld super that you can only use if you have activated metaworld.
The only thing in the command lists that is a serious problem is the ability descriptions, but the link above includes a subpage “Abilities”, which explains the abilities of every character.