There isn't much left to translate either, but here's what I see that is still left. There's degrees of important or usefulness involved, but it's mostly for completion's sake :
Some of the more important ones I believe :
-The treasure map section is still vastly untranslated, but functionnal. I personally don't care about normal treasure maps, since their names barely mean anything at all, level and seed is enough most of the time, and the right side info tells us the kind of chests we'll get there. But the legacy bosses are confusing to figure out which one is what.
-What's still untranslated in the 'Party' tab, which are mainly abilities, spells and skills.
-The menus : The 3 options in 'Edit' really make me curious
Then there's optional and fluff parts :
-Save locations, although Zoom already takes care of moving around.
-Titles and Accolades : Not much use either, but they are there.
-Quests : numbers are enough to enable them mind you, especially the DLC ones.
-Fixing the Inn Display Message (for Canvassing), and the DQVC message. Those are only used if you doing bulk saves (like I did this week to get someone 30 tags, made 30 unique characters on my flash cart). The DQVC message gets replaced when you download, but if you use the editor to make bulk saves (once again, that), you could make a custom message and your own 'shop' for those that you multi-play with.
-Historical characters : if you enable one, why not enable all of them while at it.
-Most of the Inn tab is still untranslated, but rather useless unless you just want to fill your inn with characters of your choice. Giving them maps is equally useless since you can just make a new one in the map tab.
-Monsters : again, it's one of those 'check one, check all of them' case. The tab itself is rather useless, as it serves as information only on how many you killed and how many of each drop you got.
-The full treasure map data can be downloaded from the 'Treasure Data' menu, also untranslated. That will be a pain in the butt to do though, considering the 38,000 combinations or so. That's not a big necessity either since most of the important data, such as chests and general layout, are easily readable.
All in all, right now all of the more essential data is already done, the items mostly. That's the biggest part of the project, I'm quite aware, with the amount of items in this game. Good job on that part