`` Langue d'oïl '' ( in the singular ) , `` Oïl dialects '' and `` Oïl languages '' ( in the plural ) designate the ancient northern Gallo-Romance languages as well as their modern-day descendants .
`` Langue d'oïl '' ( in the singular ) , `` Oïl dialects '' and `` Oïl languages '' ( in the plural ) refer to all the ancient northern Gallo-Romance languages as well as their modern-day descendants .