I'm also looking at porting the official translations of Lunar: Silver Star Story and Lunar 2: Eternal Blue from PS1 to their original Saturn versions. The Saturn versions have some major technical advantages, including some really excellent music and higher-quality graphics and anime cutscenes. I also really would like people to be able to play the entire trilogy on the same console. :)
I haven't done much work on Eternal Blue yet, but I'll be leaving it until the other two are closer to being finished. I have, however, finished up writing the tool that's necessary to redub the Saturn version's FMVs - which is open source, and is probably useful for other Saturn fan translations too. https://github.com/mistydemeo/cinerepak
Working on this also led me to discover some fun stuff, like how one FMV has some very obvious animation errors in the original release! 😅 It got fixed later, but the lip-syncing is obviously *very* wrong in the first version of this scene. https://awoo.space/media/doHWVHpW9VVJbUUaaKI
Here's the fixed version of the same scene, used from the second Saturn release onwards. Notice how the lip movements *actually* match the voice? lol https://awoo.space/media/eeO3GGPBapqPB2wUjl0
I'm just about done all of the anime cutscenes from Lunar: Silver Star Story, and I have playable builds with all of the FMVs in English!
I also have a full English script, and I've been making progress at disassembling the text rendering routine in order to figure out how to adapt it for English text. A sprite artist friend is also working on a new font.
https://awoo.space/media/Y_hA6l2GzF0_wSr66EI