It likely won’t receive the attention that the Mother 3 fan translation enjoyed, but Tomato has put out an English patch for Mother 1+2, Nintendo’s Japan-only compilation released for the Game Boy Advance in 2003.
Though Mother 1 has an English NES prototype floating around, this version, this version features a retranslated script, bug fixes, and various tweaks, as well as some enhancements by Tomato. The Mother 2 script is still in Japanese (menus have been translated), but it’s not like you can’t already play it in English with Earthbound.
You’ll need a copy of Mother 1+2's ROM (one you acquire through relatively legal methods, we hope) to install the patch before running it on a flashcart or emulator.
Import: Mother 1+2
See also: More Mother/Earthbound posts