The Split of Galician and Portuguese

Through the 12th and 13th centuries, Galician-Portuguese was a single language, spoken on both banks of the river Minho and the vehicle of a lyric admired across the Peninsula. Seven hundred years later it has two descendants that linguistics treats as distinct languages: Portuguese and Galician. This page is about the rupture — political before it was linguistic — that separated the two branches.

A political border, not a linguistic one

The division did not spring from any difference of speech. It sprang from a state border. The County of Portugal, south of the Minho, broke away from the kingdom of León: Afonso Henriques styled himself king around 1139, had the title recognised by León in the Treaty of Zamora (1143), and in 1179 secured from the Holy See, through the bull Manifestis Probatum, recognition of Portugal as an independent kingdom. North of the river, Galicia remained part of the Leonese realm and, later, of the Crown of Castile.

At the moment of separation, a speaker from Braga and one from Santiago de Compostela spoke, for all practical purposes, the same language. The border that now divided them was juridical and administrative — yet it was that border which, in the centuries that followed, would set two diverging linguistic histories in motion.

Two centres, two models

The decisive consequence was the rise of separate centres of prestige. To the south, as the Reconquest pushed the frontier toward the Algarve, the Romance followed the kingdom’s expansion; Lisbon and Coimbra became the poles of a standard that asserted itself as the language of the chancery under King Dinis (r. 1279–1325) and, thereafter, of an administration, a court and a literature of its own.

To the north, Galicia had neither an autonomous court nor a chancery. From the late Middle Ages, Castilian imposed itself as the language of administration, of the Church and of letters, while Galician was confined to speech and popular use. There followed the so-called Séculos Escuros (Dark Centuries, 16th–18th c.), in which writing in Galician all but vanished — not for want of speakers, who were the majority, but for want of written cultivation and of a norm.

What diverged in the language

Once their uses parted, the two varieties evolved each in its own way. Portuguese carried through changes that Galician — more conservative on some points, more open to Castilian on others — did not follow.

Latin	Portuguese	Galician
GERMANU(M)	*irmão*	*irmán*
RATIONE(M)	*razão*	*razón*
CAELU(M)	*céu*	*ceo*
GENERALE(M)	*geral* [ʒ]	*xeral* [ʃ]

The most salient contrasts are three. First, final nasality: where Portuguese fixed the nasal diphthongs -ão, -ões, -ães, Galician denasalised, yielding -án, -óns, -áns (irmão ~ irmán, razões ~ razóns). Second, the sibilant system: European Portuguese merged the old voiceless/voiced pairs and simplified them, whereas common Galician lost the voiced ones and developed, in the Castilian manner, an interdental fricative [θ] — hence ceo [ˈθeo] where Portuguese has céu [ˈsɛw] . Third, vowel reduction: European Portuguese reduced its unstressed vowels heavily, compressing the word, while Galician kept a fuller, clearer unstressed vocalism.

The Rexurdimento and the modern norm

Written Galician revived in the 19th century with the Rexurdimento, a movement of cultural recovery whose landmark is Cantares Gallegos (1863) by Rosalía de Castro. It was only in the 20th century, however — and above all after Galician became co-official in Galicia in 1981 — that a written standard was fixed. The Normas ortográficas e morfolóxicas of the Royal Galician Academy and the Institute of the Galician Language (1982, revised 2003) adopted a Castilian-based orthography (with ñ, ll, -ción), keeping written Galician apart from Portuguese spelling.

Two languages or one?

In strictly genetic terms, Portuguese and Galician form a single diasystem: mutual intelligibility is high, and the boundary between them is, to a large degree, a sociopolitical convention. In terms of the official standards in force, they are two languages, each with its own orthography, academy and institutions. The two statements do not contradict each other — they simply measure different things.

What is certain is that the split was not an event but a process of centuries, triggered by a border of 1143 and completed by the later history of each side of it. To understand modern Portuguese — and its ever-present relationship with Galician — is to recognise this common origin and the point at which the paths forked.