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The Bretons (Breton: Bretoned, Breton pronunciation: [bre'tonet]) are an ethnic group located in the region of Brittany in France. They trace much of their heritage to groups of Brittonic speakers who immigrated from southwestern Great Britain, particularly Cornwall and Devon, to expand their territory onto the continent. They also descend in some parts from Vikings. They migrated in waves from the 3rd to 9th century (most heavily from 450-600) into Armorica, which was subsequently named Brittany after them.

The Breton language is a very important part of Breton identity. Breton itself is one of the Brittonic languages and is closely related to Cornish and more distantly to Welsh. Breton is thus an Insular Celtic language and is more distantly related to the long-extinct Continental Celtic languages such as Gaulish that were formerly spoken on the European mainland, including the areas colonised by the ancestors of the Bretons.  In eastern Brittany, a regional langue d'oil, Gallo, developed; it shares certain areal features such as points of vocabulary, idiom, and pronunciation with Breton but is a Romance language). Neither language has official status under French law; however, some still use Breton as an everyday language (particularly the older generation) and bilingual road signs are common in the west of Brittany.  From 1880 to the mid-20th century, Breton was banned from the French school system and children were punished for speaking it in a similar way to the application of the Welsh Not in Wales during the 19th and 20th centuries. The situation changed in 1951 with the Deixonne Law allowing Breton language and culture to be taught 1-3 hours a week in the public school system on the proviso that a teacher was both able and prepared to do so. In modern times, a number of schools and colleges have emerged with the aim of providing Breton-medium education or bilingual Breton/French education.  There are four main Breton dialects: Gwenedeg (Vannes), Kerneveg (Cornouaille), Leoneg (Leon) and Tregerieg (Tregor), which have varying degrees of mutual intelligibility. In 1908, a standard orthography was devised. The fourth dialect, Gwenedeg, was not included in this reform, but was included in the later orthographic reform of 1941.
Bretons