This is an easy one. When starting the management console the language of the local OS will be detected. Then it will search if a language pack is present. When found, the corresponding language will be shown and troubleshooting will instantly become a lot harder (or you can just try to search for non-English errors, good luck).
Two solutions are possible to show the interface in English:
1. Change your OS language from your control panel (Regional settings). Yes, that’s a solution, but of course you already thought about that and don’t want to. So, solution 2:
2. Rename the language pack folder within the install directory of your management console. Default language pack locations of SCCM and SCVMM 2012 management console:
- System Center Configuration Manager 2012: C:\Program Files (x86)\Microsoft Configuration Manager\AdminConsole\bin\[language_code]
- System Center Virtual Machine Manager 2012: C:\Program Files\Microsoft System Center 2012\Virtual Machine Manager\bin\[language_code]
Close the management console, rename the language pack folder corresponding to your current OS language, restart the console and the default language (English) will be shown.