| la francophonie | The global network of communities where French plays a cultural, political, or social role, spanning five continents and roughly 320 million speakers. |
| Le verlan | A French slang form that reverses syllables, originating in urban youth culture and used as a marker of in-group identity. |
| L'argot | Informal, often group-specific slang used by particular social communities in France, varying by region and subculture. |
| le code-switching | Alternating between two languages or registers within a single conversation, common in multilingual francophone communities. |
| la diglossie | The coexistence of two languages or varieties in a society with different social statuses, such as French and Haitian Creole in Haiti. |
| la politique linguistique | Public decisions that regulate language use, protection, or promotion, such as France's Loi Toubon or Quebec's Bill 101. |
| l'aménagement linguistique | Planned organization of language use in education, administration, and public life, carried out by government bodies or language authorities. |
| la revitalisation linguistique | Collective efforts to restore vitality to a threatened or minority language, such as Breton in France or Creole languages in the Caribbean. |
| Un dialecte | A regional variety of a language with distinct vocabulary, phonology, and grammar, reflecting local cultural and historical identity. |
| Un accent | Distinctive pronunciation and intonation patterns that signal a speaker's regional origin, social background, or cultural identity. |
| Le langage familier | Casual, colloquial language used in informal settings among friends and family, characterized by contractions, slang, and a relaxed tone. |
| Le jargon | Specialized vocabulary used by a particular professional or technical group, such as medical, legal, or academic language. |
| Laïcité | France's constitutional principle of secularism, separating religion from public life and shaping which celebrations receive official recognition. |
| S'assimiler | The process of integrating into a dominant culture by adopting its customs, language, and values, often at the cost of one's heritage identity. |
| Conserver ou maintenir son identité | The effort of individuals or communities to preserve their cultural, linguistic, and social characteristics in the face of external pressures toward assimilation. |