Article 21-24 of the French Civil Code
No one may be naturalised unless they can prove that they are assimilated into the French community, in particular through sufficient knowledge, depending on their condition, of the French language, history, culture and society, the level and assessment procedures for which are set by decree in the Conseil d’Etat, and of the rights and duties conferred by French nationality as well as adherence to the essential principles and values of…