The first King of Portugal was a Medieval Erasmus kid: the son of a Burgundian knight and a Castillian noblewoman, he ruled over a population speaking Galaico-Portuguese and Arabic. Do we know what languages he spoke, and if he had an accent? Wasn't he seen as a foreigner in the eyes of the natives?

by Oppidano

I ask because of the major role Afonso I had in the shaping of Portuguese identity; he's always portrayed as Portuguese, and everyone seems to assume he spoke Galaico-Portuguese as a native. I imagine it's possible there aren't any contemporary sources discussing this, but maybe you'll surprise me.