Most likely, “Eduardo” refers to a Spanish-speaking ROM patcher or uploader active in the early 2000s–2010s. Several fan translations of N64 games (e.g., Super Mario 64, Banjo-Kazooie) were credited to individuals like "Eduardo" on sites like ElOtroLado, EmuSpain, or Romhacking.net. He may have improved or repackaged an existing Spanish patch for Ocarina of Time.
Many players don't realize that Nintendo released an official Spanish translation of Ocarina of Time. However, it was only included in the European (PAL) version of the game, localized for Spain (Castilian Spanish). Latin American players often received the English version. To play legally in Spanish today: zelda ocarina of time rom espa%C3%B1ol eduardo a2j rrb
The purest way to emulate the N64 version in Spanish: Most likely, “Eduardo” refers to a Spanish-speaking ROM