There are no. of villas in White town that will give you the French experience that you are looking for but they are damn expensive for solo travelers, I faced the same dilemma
@proso not that I know of, sorry. Also, in white town you won't get french families generally their property is looked after by a caretaker or are handed over for business reasons it can be cafe, boutique or a stay. I understand the homestay experience with a localite that you are looking for, but you'll have to look for it extensively