Hi Witzulu,
Since you are using Windows Vista Ultimate 64-bit you will want to get the “Windows Vista Multilingual User Interface Pack (MUI)”. Windows Vista MUIs provide a translated version of most of the user interface. MUIs require a license to be used and are only available with Windows Vista Ultimate and Windows Vista Enterprise. If you are using Windows Vista Ultimate, you can download MUIs by using Windows Update. If you are using Windows Vista Enterprise, contact your system administrator for information about installing additional languages. So since you are using Windows Vista Ultimate do the following:
*Note: MUIs are available through Windows Update as optional updates; they are not installed automatically.
1. Open Windows Update by clicking the Start button
2. Click All Programs, and then click Windows Update.
3. In the left pane, click Check for updates, and then wait while Windows looks for the latest updates for your computer.
4. If any updates are found, click View available updates.
5. Select the MUI that you want, and then click Install updates.
If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
*Note: If Windows doesn't find any updates when you click Check for updates, wait a day and then try again.
You can refer to the following link for information about this:
How do I get additional language files?
Alright Witzulu please let us know if this worked out for you; and if you have any further questions, please don’t hesitate to ask.
Brian
Microsoft Answers Support Engineer
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