This is the English patch most people used back in the day to experience this game in English. This patch is confirmed to work for SFC Any% (specifically the Devil Palace route) by cleartonic

SFC - English Translation Patch

You can use this tool to edit your save data. You will need to be able to access your save files in some way, which will be easy on emulator and nearly impossible on a cartridge. You will also need Locale Emulator for this program to work properly. This has not been tested with the English patch yet.

[SFC] Save Data Editor

SkyeSage17

Romancing SaGa 3

Amami_machi

sangorou

Hawk_Snow

JPN / NTSC

Any%

Glitchless No Doppleslasher

Glitchless

Doppelslasher

No Doppelslasher

RS3 SFC Category

RS3R NG+ Category

Glitchless Category (TA)

Super Nintendo

Wii Virtual Console

PlayStation 4

Wii U Virtual Console

Switch

SaGa

cha0sWR

edge_shaaan