If a previous language pack was broken by a Windows update, reinstalling the language through Vistalizator can sometimes restore functionality. If you'd like, I can: Tell you where to find the official language packs Guide you through installing them on Windows 7 Explain the risks of using Vistalizator in more detail Is vistalizator legal? - Microsoft Q&A
Run Vistalizator, click "Add languages," and select the downloaded language pack.
Download the Vistalizator executable and the appropriate language packs (MUI files) for your specific Windows version. Vistalizator
Works on both 32-bit and 64-bit Windows Vista and Windows 7. Method: Utilizes official MUI packages from Microsoft.
Determine your Windows version (Vista/7), architecture (32/64 bit), and Service Pack level. If a previous language pack was broken by
Overrides the one-language limit on non-Ultimate editions of Windows 7 and Vista.
If you experience a "black screen of death" (KSOD) after using it, try using the "Last known good configuration" in the boot menu (F8). Determine your Windows version (Vista/7)
Note that using Vistalizator to install restricted language packs may break the Windows End User License Agreement (EULA).