States where French is the unique official language :
Benin
Burkina Faso
Republic of Congo
Democratic Republic of the Congo
Ivory Coast
France,
Gabon
Guinea
Mali
Monaco
Niger
Quebec
Senegal
Togo

States where French is co-official

Belgium: Dutch / French/German
Burundi: French / kirundi
Cameroon: French/English ( minority English)
Canada: (especially the following provinces: Quebec (Quebec being a particular case, being a province mainly French-speaking), Ontario, New Brunswick, Nunavut and Territories of the Northwest): French/English
The Central African Republic: French / sango
Comoros: French / Arabic
Djibouti: French / Arabic
Equatorial Guinea: Spanish/French
Haiti: French / Creole
Louisiana (State of the United States): English/French
Luxembourg: French / German / Luxembourgian
Madagascar: French / Malagasy
Maurice: French/English (+ Creole)
Rwanda: kinyarwanda / French/English
Seychelles: French / English / Creole
Switzerland(Swiss) (especially the cantons of Geneva, Jura, Neuchâtel, Vaud, Bern, Fribourg and Was worth): French / German / Italian / Romansh
Chad: Arabic / French
Valley of Aoste (autonomous region of Italy): French / Italian
Vanuatu: French / English / bichelamar