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How did migrants from Britain bring the Breton language to Armorica?
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Brittany
The old walled city of Saint-Malo, Brittany région, France.
The Breton language was introduced into Armorica (modern-day Brittany) during the 5th and 6th centuries by migrants arriving from southwestern Britain. These migrations occurred during the period of the Saxon invasions in the British Isles.12
Upon their arrival, these settlers established the language firmly within the western part of the Armorican peninsula. While the western region became Breton-speaking, the eastern part of the peninsula saw the adoption of a Romance language known as Gallo-Romance. Over time, the Breton language evolved and eventually developed distinct regional dialects, though it shares an identical basic vocabulary with Welsh and Cornish.1