RPGMakerMVGame Hook patcher, Textractor. The first adds a plugin to RPGMaker MV games to spit text out to the clip board. The second can take this text, run it through translation, and display it to a window in realtime.
I'd recommend using the API access to Deepl available in Textractor; you'll need a key, but you can get that for free with signup, just need to give a cc to prevent abuse. That'll give you very good real-time machine translation. If you want to actually translate the game, I'd recommend Translator++. It's specifically designed to work with RPGMaker games (among others), and helps you keep track of where you are in the translation project, entry by entry. You COULD just end the files directly, they're all unencrypted text, but that could get messy quickly.