cgmcnama
1. The modpack guide from my sig and everything within it is for Japanese COM only. Use the guide from the OP for the English Repack !
2. All dlc links from the russian site (including the one above) are for jp version
3. Custom Maid Ultimate summer 2020 already has all dlc up until july 2020. The rest of them up to this date I covered in the guide.
4. I can't add Jp dlc to the En version dlc list, even though some of them can be manually ported.
5. DO NOT INSTALL JP DLC ON EN VERSION.
Some simple DLC such as costume sets may work if you manually copy the .arc files to GameData but others will break the game. If you don't know what you are doing don't mess with it. Obviously, Jp dlc won't be translated in the En version unless you install XUAT from CMI.
DLC .arc files with the prefix "parts_" go to Gamedata folder.
Other costume sets are exploded into separate .arc files for material, model, texture and menu. Those files go to GameData20.
If you want to experiment with jp dlc on en version I suggest you backup your current installation.
If the jp dlc costume set is not recognized due to missing paths entries you can use SybarisArcEditor and manually extract the files from the arc files (material, model, texture, menu) and use them as mods in the Mod folder. So technically all the costume sets from jp version can be ported as mods and have their menus edited with english description if you have nothing better to do with your time.