An updated version of Windows Defender Beta 2 is now available from the Microsoft Download Center.
This update resolves the two issues relating to non-English versions of Windows and referenced in KB915087. If you are running on a non-English version of Windows, then we advise that you uninstall the previous installation and install the updated version. If you are running on an English version of Windows, then no action is required.
Windows Defender (Beta 2) x64 is also available and re-released (updated) yesterday.