Since there is no longer an "official" active download page from Microsoft for the full OS, here is how you can find the Spanish 32-bit ISO: Internet Archive (Archive.org)
El proyecto ofrece un directorio actualizado con enlaces directos a versiones originales y "untouched" de Windows Vista. Descargar Windows Vista Ultimate 32 Bits Iso Espanol
: Because Windows Vista no longer receives security updates, it is highly vulnerable to modern malware. It is strongly recommended to use it only in a Virtual Machine or on a computer not connected to the internet. Since there is no longer an "official" active
Microsoft has officially ended support for Windows Vista, meaning official download links for the full operating system ISO are no longer hosted on their primary download site. However, the software community maintains archives for historical and recovery purposes. Windows Vista Ultimate 32-bit (x86) ISO Links Microsoft has officially ended support for Windows Vista,