SSE Converting mods to Japanese

[Cambionn]

So, previously I used the English version, but some time ago I switched to the Japanese version of Skyrim. Using the "replace .exe files with the ones from the English version after updates" method I'm able to have the newest updates and such properly, and all things like SKSE64 and such work fine.

However, I was working on a Character Overhaul, and right now, half my names are katakana and the other half are English names in alphabet. So I've been wanting to translate that, but got the following issue:

• Trying to load the file into CK with the Japanese installation makes CK crash after it's done loading, without any message or error showing. This also happens on clean installation with only the files needed to make the mod itself work, which I hold in a back-up folder.
• Switching to the English version of the game (which I also have in another back-up folder) allows me to open it just fine, but whenever I type kana it'll change into question marks so I still can't translate it normally.

Windows is set to have Japanese as default language, with display language overridden to English, and I do have proper Japanese support anywhere else, so I can't imagine the problem is outside of the CK/Skyrim unless I'm missing something.

What is it with Bethesda supporting Japanese, but not Japanese input (both CK and in-game)?
More importantly, how can I properly convert my mod to Japanese so all names are in kana as they should while using CK?

I do know about tools like xtranslator, but then I still have to edit all these names (which I did for now, but I will have to do this for any newly edited NPC) whereas opening them in CK with a Japanese installation would save me some work in that regard. I'm not looking to release this as tons of other character related mods are merged into it for compatibility reasons and installation would be more complex than drag and drop into datafolder, so I don't really care much if there is no English version afterwards.

Edited December 21, 2018 by TDOGH