I am currently making a Korean patch for my personal use. (build: beta 21.3)
It's a rather stupid question, but...
I can't find the story mode's script file.
I looked through all the JSON files in the language folder and found only UI, Trade, Name, etc.
(\idol-manager-win\IM_Data\StreamingAssets\Languages)
I have a lot of text, so I want to translate the main story first, which file should I look for?