Here are some xliff files! You can import these directly into your CAT tool if you are not yet comfortable with filtering java language. Please note that you will still have to manually manage some non-translatable content yourself, but it should be less frightening than the actual .js file ;)
These are plain xliffs made thanks to the Okapi framework, you should be able to open them in any and every CAT tool there is. Open source for the win!
You can find them here: https://localicows.itch.io/public-xliffs-locjam-2023. Please don't hesitate to tell me if you think I should post the files elsewhere.