Sarah Chalke's German is actually much better than that of the two actors playing the Germans. The translations of the German sentences is pretty much accurate; Sarah Chalke's two untranslated lines are as follows: the milkmaid line is, "Good morning, would you like to milk the cows?" and the hausfrau line is, "Eat your schnitzel, or you won't get a dessert!" In the German dubbed version, the Muellers are called Olsen, they're from Denmark and speak Danish.