Here are some of the most well-known:
* West Africa: Senegal, Ivory Coast, Mali, Burkina Faso, Benin, Togo, Niger
* Central Africa: Gabon, Cameroon, Central African Republic, Democratic Republic of Congo, Republic of Congo
* East Africa: Rwanda, Burundi, Djibouti
* North Africa: Algeria, Morocco, Tunisia
These countries all have different histories and relationships with the French language, but it's a common thread that unites them and helps them connect with each other and the wider Francophone world.