I know a German couple where both parents speak English and German. (Though the wife is much more comfortable with English than her husband.) The way they int

I know a German couple where both parents speak English and German. (Though the wife is much more comfortable with English than her husband.) The way they interact with their daughter is that the father always speaks German to her, and the mother always speaks English. At one point, the mom had to tell her daughter that "you have to have daddy read you that book, because it's in German." :) It's working pretty well so far for their daughter; she's certainly comfortable and fluent (for her age) in both languages.