This article is quite old. I’m just updating it with new information and confirmed download links to the language packs to make sure everything remains fresh.
If you want to download and install any language pack from below links, you will need to make sure that you are using Windows 7 Ultimate, Professional or Enterprise editions because these language packs can only be installed in these editions. Other editions of Windows 7 like the Starter or Home editions will be helpless if they want to change the language of their Operating Systems.
One way of installing the language packs on Windows 7 Starter or Home Editions is to use Vistalizator which is very easy to use. Just download it from the author’s site and download your language pack of choice from the links below. Enter the path of the downloaded language pack file in Vistalizator and it does the rest of the work seamlessly.
A language pack changes the language of the Windows Operating System. The default language is always English and other languages can be installed manually. All the language packs are described in KB2483139. Here is the list of language packs available from Microsoft for direct download:
Download Official 32-bit (x86) Windows 7 SP1 MUI Language Packs