To play the game in English you'll need the game (ROM), an emulator, and the patch.
-Look for the ROM at The Other RPG Classics.
-Get an emulator at Zophar's Domain. I recommend either ZSNES or SNES9x.
-Now...about the patch. The group who did the translation, RPG One, released two complete versions of the patch. One translates the game in keeping with the original official Nintendo translations (ye olde English slang), and the other translates it with the original Japanese text more in mind. Pick them up here and here, respectively. Remember to only use one at a time! For patching instructions, please visit the Translation Section.