Drag down from the top of the screen, click on the cogwheel, scroll down to ALLGEMEINES MANAGEMENT, then SPRACHE UND EINGABE. Click on SPRACHE... to open the language settings, then SPRACHE HINZUFÜGEN. Click the + symbol to ADD ENGLISH to the list, then if the option is there, either DELETE the German language profile, or set ENGLISH as the default language. Once ENGLISH is set as the default, long-press on GERMAN - this brings a dialog box up at the bottom, with the option to REMOVE it.