In Europe:
* France: The largest country where French is the official language.
* Belgium: French is one of the three official languages, alongside Dutch and German.
* Switzerland: French is one of the four official languages, alongside German, Italian, and Romansh.
* Luxembourg: French is an official language alongside Luxembourgish and German.
* Monaco: French is the official language.
* Andorra: French is one of the official languages, alongside Catalan and Spanish.
In North America:
* Canada: French is one of the two official languages, alongside English.
In Africa:
* Benin
* Burkina Faso
* Burundi
* Cameroon
* Central African Republic
* Chad
* Comoros
* Côte d'Ivoire
* Democratic Republic of the Congo
* Djibouti
* Gabon
* Guinea
* Madagascar
* Mali
* Niger
* Republic of the Congo
* Rwanda
* Senegal
* Seychelles
* Togo
In the Caribbean:
* Haiti: French is the official language, although Haitian Creole is widely spoken.
In Oceania:
* Vanuatu: French is one of the official languages, alongside Bislama and English.
Other:
* New Caledonia: French is the official language.
* Wallis and Futuna: French is the official language.
* French Guiana: French is the official language.
* French Polynesia: French is the official language.
* Saint Pierre and Miquelon: French is the official language.
It's important to note that while French is official in these countries, other languages are also spoken. Additionally, some regions within these countries may have different primary languages.