French (le français [lə fʁɑ̃sɛ] or la langue française [la lɑ̃ɡ fʁɑ̃sɛz]) is a Romance language, belonging to the Indo-European family. It descended from the spoken Latin language of the Roman Empire, as did languages such as Italian, Portuguese, Spanish, Romanian, Catalan and others. French has evolved from Gallo-Romance, the spoken Latin in Gaul, and more specifically in Northern Gaul. Its closest relatives are the other langues d'oïl—languages historically spoken in northern France and in southern Belgium, which French (Francien) has largely supplanted. French was also influenced by native Celtic languages of Northern Roman Gaul like Gallia Belgica and by the (Germanic) Frankish language of the post-Roman Frankish invaders. Today, owing to France's past overseas expansion, there are numerous French-based creole languages, most notably Haitian Creole. A French-speaking person or nation may be referred to as Francophone in both English and French.

French is the official language in 29 countries, most of which are members of la francophonie, the community of French-speaking countries. It is spoken as a first language in France, southern Belgium, western Switzerland, Monaco, certain parts of Canada and the United States, and by various communities elsewhere. As of 2015, 40% of the francophone population (including L2 and partial speakers) is in Europe, 35% in sub-Saharan Africa, 15% in North Africa and the Middle East, 8% in the Americas, and 1% in Asia and Oceania.