Manual translations of an entire game take a lot of time and effort. For a modder to make one there would need to be a lot of demand or motivation so I doubt you will find one. Sorry. That said this community is a little dead lately so it might not be the best place to look.

It's not Atiqua. Most if not all of the FF games on steam right now are PS era or later. Some are mobile ports others are DS and others still are playstation 3 or Xbox 360 ports. None to my knowledge are SNES.

If it's possible I wouldn't hold your breath. This long after a game is released without a lot of demand modders don't tend to bother. That said if you are really hurting for that then why not just set up an emulator for the original SNES release. It's easy to find them along with the roms.

Hang on aren't those cheats hard coded into the game now? Why would you need an editor or mod for those?

Which mod are we talking about here?

Just found this
https://www.youtube.com/watch?v=SjmAjq67dB8
This guy might be the one to ask on how to do it

You may be able to find a save editor for the steam version of the game somewhere which MAY be able to edit your location to put you back in sunleth. If you do this I highly recommend you A) backup your save to a safe place before editing and B) make sure after you are done to re0edit your save to put you back to where you were. 1 other possiblity is using cheat engine and trying to find a cheat table somewhere for it or requesting one at their site. I can't really help in any of this. And considdering the only ways to do this would be to create a mod to allow you to return to sunleth(most likely via inserting something into the game which was never there to begin with which is difficult) or via save editing I doubt the modders here will bother. Besides they are all pretty busy lately with real life stuff and don't often visit.

I doubt they will be deleted for a while honestly if at all. While they aren't relavent to the forum the mods who take care of it are almost never here any more. KrisanTyme still drops by but none of them really have much time to even repost new links to the mods.

True. Now considder this. How would you do it? You got 2 options. First if the devs did intend to have those fights originally and they created and left behind the assets for them then a modder would have to find, decrypt and activate those assets and mod the game to trigger them which means editing the flags. Second implies SE either did not intend for those fights to be there or cleaned up the assets before release which would mean the modders would then have to creat said assets and mod them into the game as mentioned previously. Given how busy the modders here have been elsewhere and irl I don't see this happeneing any time soon but thats me. I won't discourage your trying to get them to do it though as it's an awesome idea and I do love FF9 more than most FF games

Hmmmm not a bad idea though you can actually fight those bosses in the crystal world.