A small patch that replaces the English text in the backgrounds with more setting-appropriate Spanish.
Made for Guevara, but has been tested and works on Guerilla War (including Crimental's Spanish translation which leaves the backgrounds untranslated).
Database match: Guevara (Japan)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: 1ECD43A03DF08F3A27DACA5E2A7879B9AFA4D63C
File CRC32: E77C00C
ROM SHA-1: 58B6B97100127B4509521487D8EB9C6EC21CF4EC
ROM CRC32: 63C4E122