A Chronology of the Portuguese Language

The history of Portuguese has no sudden beginning: it is the history of a Latin that was never not spoken and that, over fifteen centuries, turned into a new language. The chronology that follows gathers the milestones that frame that transformation — political, literary and normative — from the Latin roots to the contemporary standard. The earliest dates are approximate; the boundaries between periods are useful conventions, not sharp lines.

Roots: from Latin to kingdoms (3rd c. BC–9th c.)

The language begins with Romanisation: the Latin spoken by Rome’s soldiers, settlers and officials overlays the pre-Roman languages of Hispania and, in the far north-west, gives rise to the Romance from which Portuguese descends.

Date	Milestone
218 BC	Roman landing in the Iberian Peninsula (Second Punic War); Romanisation begins.
1st c. BC–5th c. AD	Spread of Vulgar Latin; Gallaecia is durably Romanised.
409	Arrival of the Germanic peoples; Suebic kingdom in Gallaecia (Germanic superstratum).
711	Muslim conquest; centuries of contact with Arabic (lexical influence).
868	First County of Portugal, in the course of the Reconquista.

The written language and its lyric (12th–14th c.)

In this phase the north-western Romance, Galician-Portuguese, surfaces in writing and becomes a prestige literary language across nearly the whole Peninsula. Latin recedes in the chancery as the vernacular advances.

Date	Milestone
1143	Treaty of Zamora: Afonso Henriques recognised as king; Portugal’s independence.
late 12th c.	First documents with systematic vernacular (e.g. the Notícia de Fiadores, 1175).
1214	Testament of Afonso II, among the oldest royal texts in Portuguese.
13th–14th c.	Height of the troubadour cantigas, gathered in the cancioneiros.
1279–1325	Reign of King Dinis: Portuguese becomes the language of the royal chancery.
1290	Founding of the Estudo Geral (the future University of Coimbra).

Middle Portuguese and the expansion (15th–16th c.)

Middle Portuguese is the transitional language that leads from Galician-Portuguese to Classical Portuguese. It coincides with the opening to the world: the language leaves the Peninsula and becomes transcontinental, carrying with it the seed of the future varieties.

Date	Milestone
1415	Capture of Ceuta: the maritime expansion and the spread of the language begin.
1500	Pedro Álvares Cabral reaches Brazil.
1516	Cancioneiro Geral of Garcia de Resende, closing the medieval lyric tradition.
1536	Grammatica da lingoagem portuguesa by Fernão de Oliveira — the first grammar of the language.
1540	Grammar of João de Barros, securing Portuguese as a language of learning.
1572	Publication of Os Lusíadas by Luís de Camões.

The standard and the modern era (17th–20th c.)

Modern Portuguese, stabilised from the 16th century onward, already differs little from today’s in grammar and vocabulary. The period is marked by the building of an orthographic standard and by the growing autonomy of the overseas varieties.

Date	Milestone
1822	Independence of Brazil; consolidation of a distinct Brazilian standard.
1911	First official spelling reform in Portugal, on a phonetic basis.
1945	Luso-Brazilian Orthographic Agreement (adopted in Portugal).
1975	Independence of the African colonies; Portuguese becomes official in new states.
1990	Signing of the Orthographic Agreement of the Portuguese Language.

Contemporary milestones (21st c.)

Date	Milestone
1996	Founding of the CPLP (Community of Portuguese-Speaking Countries).
2009	The 1990 Orthographic Agreement comes into force in Portugal, with a transition period.
2019	UNESCO establishes World Portuguese Language Day, on 5 May.

Today Portuguese is an official language of nine countries and of several international organisations, spoken by more than two hundred and fifty million people across four continents. The chronology that ends here does not close: the language keeps changing, and each variety writes its own chapter.