Changing the language of the SCCM Console

Rename the language pack folder within the install directory of your Management console.

System Center Configuration Manager 2012:
C:\Program Files (x86)\Microsoft Configuration Manager\AdminConsole\bin\{language_code}

Close the management console.

Rename the language pack folder corresponding to your situation.

In my case it is nl.

Rename it to nl_backup.

Restart your console.