I just noticed, that the control key is untranslated in the dialog for recording a macro. Please see the screenshot below. Ctrl should be translated as Strg in German. Click on Makro aufzeichen (in English Record Macro) the Entwicklertools tab (in English Developer) for displaying the dialog. Or, easier, just click on the corresponding icon on the left side in the status bar.
Once you have opened the dialog, please enter a letter and hold the shift key down. Then appears the additional key Shift next to Ctrl which is untranslated too. Shift should translated as Umschalt.
I also have Excel 2010 installed on this machine and there the shortcut key is untranslated too. So I guess, maybe the issue is already in your database.