The correct response should be "We love French dishes." No argument here.
However, it should also accept plates, as in context this would work fine.
What troubles me is that still today, if you say "We love the French dishes," it puts the words "love" and "the" together as if there is no space ("We lovethe French dishes.), and then tells you that you are the incorrect one with too many extra spaces.
IMHO, the word "the" should be accepted, as this is still a possibility, and also the "correct" response needs to separate these two words with a space.
The confusion here seems to be, what do they mean by the word 'dish?' Do we love the PLATES (and bowls and cups) from France, or do we love French FOOD (cuisine)? I would never, ever say "I like French dishes," unless I was talking about the actual porcelain items we serve food upon. Otherwise it would be French food or French cuisine that I like.
"platos" can can mean "plates" (things you eat off of) or "dishes" as in dinnerware in general (plates, bowls, cups, platters, etc.) or food types.
I don't think there is a specific Spanish word for "meals". Meals in general would be "comidas". ("Comemos nuestra comida principal al mediodía" (We eat our main meal at noon). But specifically, you could also have the morning meal ("el desayuno"), the noon meal ("el almuerzo") or the evening meal ("la cena").