"Come preparano questo pesce in Francia?"
Traduzione:How do they prepare this fish in France?
"In France" (The location) can always be at the start OR end in a statement; "In France they cook fish" , or only at the end in a question "How do they prepare this fish in France". If you want to put 'In France' at the start, you need a comma (,). "In France, they cook fish".