Because this software is "abandonware," you won't find it on official Microsoft pages. Instead, you have to look toward digital preservation sites:
Here’s a draft for a responsible post: descargar office 2003 portable espa%C3%B1ol
Descargar y usar no es recomendable debido a graves riesgos de seguridad y problemas de compatibilidad legal. Because this software is "abandonware," you won't find
: Microsoft still provides specific documentation and compatibility packs that allow Office 2003 to interact with modern file formats like .docx . Key Features and Compatibility Because this software is "abandonware