CEVAP:

In France, naturalization is secondary to gaining citizenship. In contrast to the declaration,
the naturalization procedure is discretionary, i.e. subject to the control and approval of the administration. The naturalization procedure in France requires five years of permanent residence,
French language competence, assimilation into the French community, and good morals and customs
including no prison sentences of more than six months or offences or crimes against State security. Unlike many other countries, France does not require candidates for naturalization to renounce their original citizenship.