The following bug has been logged on the website:
Bug reference: 8491
Logged by: Daniel David MartÃnez Romera
Email address: ddmartinez@geografos.org
PostgreSQL version: 9.3.0
Operating system: Windows 7
Description:
postgresql-9.3.0-1-windows-x64.exe
Installing this, the (es_ES) Spanish User Interface option don't work. It
seems overwritten by French or something.
Best regards