It is only available in English. You can download it from MSDN website.
The .NET Framework Repair Tool follows a four-step process:
- Tries to troubleshoot setup issues
- Applies the fixes
- Tries to repair all installed versions of the .NET Framework
- Collects logs
It also provides the offline support .If your computer has limited or no Internet connectivity, you should use Offline mode for the repair.
For more details you can read the original blog post by Rakesh Ranjan Singh on Microsoft website.