She was first called "Marie de France" by the French scholar Claude Fauchet in 1581, in his "Recueil de l'origine de la langue et poesie françoise", and this name has been used ever since. She wrote in Francien, a dialect localized around Paris and Île-de-France, but there is presence of an Anglo-Norman dialect in her writings. Hence scholars generally deduce she lived in the parts of Île-de-France close to Normandy, or alternatively in an area in-between such as Brittany or Vexin. But Anglo-Norman influence may be due to her living in England during her adult life, which is also suggested by the fact that so many of her texts were found in England. The signification of the phrase "si sui de France", however, is ambiguous and equivocal. Marie might possibly not have stated that she was from France if she was originally from a region governed by Henry II such as Brittany, Normandy, Anjou or Aquitaine, unless she had been thoroughly anglicized.