Liberté, égalité, fraternité French for "liberty, equality, fraternity", is the national motto of France. For BO to remind the French of this, was timely, since many here were thinking about voting for the daughter of a holocaust denier. A woman, who like DT had understood how playing on people's fears rather than on their hopes and dreams for a better future, was the most effective way of getting their vote. France, like America, since their respective revolutions, has made the cultural diversity of her immigrants into the wealth of the Nation.
So she has no official role here in France, apart from being the President's wife.
and the rest, as they say, is history.
