Help Needed: How to translate Pokemon US/UM, where do i start?

[nmbrxl]

Hi everyone,
Backstory: Ive always wanted to play Pokemon US/UM in my native language, there was a Vietnamese fan translation group called DevilCatTeam who worked on these games. Sadly, they stopped working and went inactive about 3 years ago. Since then, no new Vietnamese patch has come out, so ive decided to try and finish or redo the translation myself but i havent had much luck with it. I would really appreciate your help or guidance.

TL;DR: id love to try and do it myself, even if it takes time.

What I have done so far:

Right now, I’ve only taken the very first step:
I used HackingToolkit3DS to extract the ROM of Pokémon Ultra Sun, and now I have folders like: ExtractedRomFS, ExtractedExeFS, ExtractedBanner, etc. Im kinda lost right now, I havent edited anything yet, I dont know which files contain the game’s dialogue, how to open or modify them, or how to handle fonts for Vietnamese characters.

Any tips, links, or tools you can recommend would help me?

Thank you in advance for any advice or tool suggestions!