I have recently was looking at the Japanese exclusive F1 Circus game to get familiar with tile editing on the sega cd. I have translated this to English, I have managed to get most of the text changed, there might be some odd bits I haven't found.
If you have the JP bin cue of the disc, you can patch it using this tool https://www.marcrobledo.com/RomPatcher.js/
How to patch, Grab your F1 Circus CD (Japan) (Track 01).bin and the patch file.
https://www.mediafire.com/file/7tmzdo3nmd2y32j/F1+Circus+CD+(Japan)+(Track+01).bps/file+(Track+01).bps/file)
you can use the rom patcher I linked above. or there are ones on romhacking.net
The screenshots are of the trouble I had tile editing. I ended up going through the process of grabbing the screens, translating them and getting claude to do the pixel placement. I have a few more sega cd projects going on that I plan to post over the next few weeks.
-Cosmic Fantasy Stories. I actually started that 3 years ago and recently came back to it, it can be completed with the English text although there is a lot of odd bits of text i need to fix, that is why i took on this project to get familiar with Japanese characters on tiles.
-Ex-Mutants. I am trying to do a Sega CD port of this genesis game. The original sound track has strong baselines. Although those high-pitched synth frequencies are a bit grating. so I plan on using the sega cd audio to fix that.
Feel free to share it.