Comment by MarkMc

I don't think there are any German undergraduate programs that are entirely in English - you will most like need to learn German to CEF level C1 to pass the German university entrance exam (Feststellungsprüfung).

This is a useful website to determine whether your high school qualifications are enough to attend a German university: https://www.uni-assist.de/zulassungsvoraussetzungen/index.ph...