Lucky you - for various reasons my grandfather never taught his kids
German so I don't know more than a few words which we use as part of our "family dialect" (we also have a few Czech and Yiddish words!). All of my northern European heritage comes from my grandfather - the other 3/4 of my heritage is English and Scottish with a bit of Welsh, Irish and French as well.
So anyway, I speak English and some Italian (I did Italian at university).