Africa:
* Algeria
* Benin
* Burkina Faso
* Burundi
* Cameroon
* Central African Republic
* Chad
* Comoros
* Congo, Democratic Republic of the
* Congo, Republic of the
* Côte d'Ivoire
* Djibouti
* Gabon
* Guinea
* Madagascar
* Mali
* Mauritania
* Morocco
* Niger
* Rwanda
* Senegal
* Seychelles
* Togo
* Tunisia
Europe:
* Belgium
* France
* Luxembourg
* Monaco
* Switzerland
North America:
* Canada
Oceania:
* Vanuatu
Other:
* Haiti (French is an official language, but Creole is more commonly spoken)
It's worth noting that while French is official in these countries, the extent to which it is spoken varies significantly. In some countries, it is the primary language of the majority of the population, while in others it is spoken by a smaller elite or used primarily for official purposes.