Gallo language
Gallo (endonym galo) is one of the Oïl languages spoken in Upper Brittany, in western France. It is traditionally spoken in Ille-et-Vilaine, Loire-Atlantique, and the eastern parts of Morbihan and Côtes-d'Armor, on the eastern side of the Breton linguistic boundary running roughly from Plouha to the Pénerf river.