The article says "Something important that should be clarified before we move on is that machine translation (specifically a combination of DeepL and ChatGPT 4o/4.5) was used during the initial hacking phase for testing purposes. Once it was time to translate the game proper, multiple human translators then took over."

Fan translations have used Babel Fish or similar during the development process for decades. If the final script isn't AI translated I don't see any issue with that.