If you have the Ultimate or Enterprise edition for Windows Vista or Windows 7, you can download additional language packs by using Windows Update. Once you turn on Windows Update, you can choose which languages you want to install (language packs don't update automatically). Here’s how to do it.
In the list of results, click Windows Update.
Click Check online for updates from Microsoft Update, and then wait while Windows looks for the latest updates for your computer.
If any updates are found, click Optional updates are available.
Under Windows 7 Language Packs, select only the language pack that you want (installing all of them might take up too much space on your drive).
Click OK, and then click Install updates. If you're prompted for an administrator password or confirmation, type the password or provide confirmation. You might have to restart your computer too.
Under Windows Vista Ultimate Language Packs, select only the language pack that you want (installing all of them might take up too much space on your drive).
Click OK, and then click Install updates. If you are prompted for an administrator password or confirmation, type the password or provide confirmation. You might have to restart your computer too.
If Windows doesn't find any updates when you click Check online for updates from Microsoft Update, wait a day and then try again.
Windows 7
Add or change an input language
Install or change a display language
Language packs for Windows 7
Windows Vista
Add an input language
Change your input language
Install a display language