MUI y LIP

Paquetes de lenguajes y como instalarlos en Windows 7
http://www.mydigitallife.info/download-windows-7-mui-language-packs-official-32-bit-and-64-bit-direct-download-links/

After downloading the Windows 7 language packs, run the .EXE executable file to extract the .CAB language pack (LP) cabinet file.
Then, follow the guide to install language pack in Windows 7, and guide to change display language on Windows 7 user interface and welcome screen.
Update: Windows 7 SP1 Language Packs (MUI)
http://tecnicambalandia.blogspot.com/2009/08/32-bit-os-or-64-bit-os.html