Alright, here is the completed work.
All you have to do is extract the .zip folder to access the data and a completed save file with the reminiscence room.
To get the info translated, just paste the translated .json files over the existing .json files that are in the data folder from the base game folder. If you don't have access to the data folder from the base game, extract the .zip folder that had the original game with a program such as sjisunzip.
To get the save file, start a new game, create a save file, and dump the completed file19 save into the saves folder.
Edit: I have tried my best to make all of the text flow well with the custom name you create at the beginning, but if you choose a long name, some parts might barely crop off-screen.