Robin!
Thanks so much for, as always, the detailed explanation.
I started to send you a PM asking you and then thought... everyone on here already knows I am language ignorant so if it was a stupid question who cares and if it wasn't then maybe a few of us could learn something.
I wonder if they teach the "non native" German at The German School (it starts at pre-school and goes thru high school). The principal is from Kassel, Germany.