When you start WinOnCD a launcher will be opened. Select one of the project types (it doesn’t matter which, just hit an icon in the circle) and WinOnCD should start up. Now look for “Optionen” (which means options) on the top (see the attached picture) and click it. Highlight “Einstellungen” (which means properties) on the drop-down menu and click on it.
A new window will now be opened.
Search again for “Einstellungen” (top right of the new window) and click on that sheet. You will find a drop-down menu for “Sprache” (which means language(! )). Click on the small arrow and select “English” as your preferred language.
Click on “OK” twice and shut down WinOnCD. Next, hit “Nein” (which means no) as you don’t want to save any changes you have made to the template.
Restart WinOnCD and now the program should start in english.
I hope you’ll get through.