Got it. Thanks!
Since the DLC is untranslated, I might as well just wait for the DLC to be translated before I actually try this game, and I assume the folder's gonna automatically be updated to 2.13 once that's done.
In that case, if you only want the original game without the dlc, you have to go to the ci-en page and download patch 1.14 and copy it to the folder that would return the game to its original state without the dlc. It is not the most recent one, which is the 1.15 but this only fixes things for the Chinese translation so it's not important if you are not chinese.
I assure you that the developer has created a fucking mess with the updates so it is normal to get lost
The dlc will not be translated by the developer, it has to be someone who makes a fan or an mtl because since it is located in the future for an official translation (it is on steam) the developer will not translate it like the original game without the dlc
edit: The dlc is made as post game content but it has added about 14 scenes ntr or another guy fuck the girls if you lose against the leader of the sexual sect almost at the end, therefore those 14 scenes will not be translated because they belong to the dlc is like a bad ending.
One option is to use mtool to translate the dlc with a poor mtl to at least have the content of the dlc translated as the tool only translates texts in Japanese, the rest of the text in English does not change it and only translate the text in Japanese