Japanese locale refers to the ability of your computer to parse japanese characters correctly. The way it usually works without any installations of locale emulators is to use the extraction program Winrar. It allows you to extract a game in a specific locale, which allows most every game to run just fine.
So, download Winrar the extraction program. Open the game file you downloaded with it. Press CTRL + E to open a language locale menu and find and select "932 - Japanese". Then you click "extract to" and press Enter. This has now extracted the game using japanese locale.
OP usually means original post or original poster.
There are 2 different versions of the game that should work as i described in the previous post. One is the link named "Patch" in the original post. The other is the comment you replied to, the gofile one talking about the latest DLsite release.
I... dont know where you found the vscode thing. In the github of this game's translation i only see the CSV folder.
So to reiterate exactly what you should do (what i did and worked for me):
1. Download and Winrar the extraction program, just google it and it should show up instantly. The free trial version will warn you to buy it but you can just close the pop-up of the warning and use it normally.
2. Go to this
post. Click on the gofile link. Download the file.
3. Open the downloaded file with winrar.
4. After opening it in winrar, wait a few seconds. The trial version warning will appear which you can close. Then press CTRL + E to open a language setting menu. In that menu find and press "932 - Japanese". Now press "Extract to" at the top of the Winrar program and then press Enter (this will extract to the same location the file you downloaded is).
5. Go to the
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of the translation and the .zip file shown there. Extract that zip with winrar like the game file. (Open with winrar, ctrl + e for japanese locale, 'extract to' for same location as where it you downloaded it)
6. Now, you should have 2 folders, one from the gofile link which is the full game and one from github which is the translation. Inside the gofile, there should be a few different folders in japanese. One those (i dont remember which one, i will edit this comment in a few hours with the exact name) has english files ("SuccubusDuel.exe", and it should be last modified on 01.05.2024).
7. Now exist 2 possibilities (will edit with precise info in a few hours), either you can see a CSV folder or there isnt one.
If there is no CSV folder, then start the game once. Now there should be a CSV folder. The menu should also already have the 3rd "language" option without you doing anything else. If it doesnt, you probably found the raw (original) game files before they were patched. Try to find the patched ones. I will update with info on this in a few hours.
8. Copy the translation's CSV folder you had extracted previously onto this CSV folder, and overwrite (say yes to replacing).
9. Now, when you open the game, you can go to the 3rd option "language", and select english. Now a lot of things should be in english. The translation is not complete and as far as i am aware, these patched files lost the ability to auto-translate the non-translated text. Nobody answered me when i asked about it.
Edit: Sorry, forgot to respond to your question. The "Win" gofile in the original post is unpatched but should use an autotranslator to translate everything after a bit of time. Its just a bit bad at doing it.
The other one "Patch" gofile is the entire game and patched, but an outdated version.
The comment gofile is the latest version with the translation patch.
The translation patch is the thing giving you the 3rd menu "language" option.