Unfortunately there's no text extractor/inserter for RPG Maker games that I know of so everything had to be done manually for each instance of every event... OTL It's a double edged sword because it's a LOT of tedious work (this was roughly a year-long project for me, and that was before I was in school so I was working on it constantly) but at least it makes it accessible for people like me who don't have a lot of programming knowledge.
For anyone hoping to translate I would simply recommend downloading RPG Maker 2000 and looking up some tutorials to familiarize yourself with the engine and how text entry works. Having experience using it to make games in the past really helped a lot with the project so I'd play with the tool a bit to learn your way around it.
RPG Maker has an annoying quirk where it doesn't tell you the maximum length of a sentence and so text will get cut off if it exceeds the limit so a tool like this will be immensely helpful: https://forums.rpgmakerweb.com/index.php?threads/en-i-rpg-maker-message-tool.44677/
I'm assuming you're translating off the English version of the game so you shouldn't have to worry about weirdness with non-Unicode characters since I renamed the resource files and changed all the script commands to reference the new ones. If you're translating off the Japanese one... That's too complicated for me to go into now but you can message me if you need to know lol
It's a really text heavy game so it'll be a lot of work for a script that size, but it was really rewarding to work on! I hope my advice helps.