How a single royal decree transformed a collection of dialects into French

Cultures · Published 30 September 2026 Swipe more like this →

In short: Before the 16th century, France was a linguistic patchwork of Oïl and Occitan dialects. Then, a landmark law changed everything. Discover how the Middle French period stripped away complex grammar and reshaped the very identity of a nation.

Spanning from the mid-14th to the early 17th centuries, Middle French represents a pivotal era of linguistic transition. Unlike the preceding Old French, this version of the language is largely intelligible to modern speakers. The period was defined by a massive structural simplification: the complete disappearance of the noun declension system. As the distinction between nominative and oblique forms vanished, plurals were simplified to a mere 's', and the language began to rely more heavily on strict word order for meaning.

For centuries, Latin remained the prestigious language of bureaucracy and education. This changed decisively in 1539 with the Ordinance of Villers-Cotterêts, issued by Francis I. This decree mandated French as the sole language for legal acts, effectively pushing aside Latin and regional tongues like Occitan and Franco-Provençal. However, the linguistic landscape remained diverse; while the crown pushed for unification, southern France continued to be dominated by Occitan, and the north spoke various Oïl languages.

The era was also a melting pot of vocabulary. Italian humanism, introduced via the French wars in Italy between the 1490s and 1550s, contributed military and architectural terms like 'canon' and 'balcon'. Meanwhile, contact with the Americas brought words like 'cacao' and 'maïs' into the lexicon. While scholars sometimes modified spelling to mimic Latin roots—often creating a gap between how words looked and how they sounded—the period laid the essential grammatical and vocabulary foundations for the Classical French that would follow.

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