My grandmother was fluent in French and German. I tried. My French isn't too bad. But I only had two quarters of German in college. German declines. So did I.
I was in Gstaad, in the off season! with my mother. We went into a store to buy chocolate. (Toblerones! Switzerland's greatest contribution to civilization!) I stopped to tie my shoe, so mother and I didn't go into the store together. They knew mother spoke English. What else would a woman in a tweed suit and oxfords speak? But they spoke to me in German! I can still speak enough to buy chocolate. Aber das is alles. And I couldn't tell you if they liked mother more, or me.