If you're looking for a family friendly environment that serves French cuisine, try the coffee shop Cocum.   However, they are more expensive than most restaurants with their customer rating.
[['Cocum', 'eatType', 'coffee shop'], ['Cocum', 'food', 'French'], ['Cocum', 'priceRange', 'more than £30'], ['Cocum', 'familyFriendly', 'yes']]