Auraicept na nÉces (Old Irish: [ˈaurikʲept na ˈnʲeːgʲes]; "The Scholars' Primer" ) is an Old Irish text on language and grammar. The core of the text may date to the early eighth century, but much material was added between that date and the production of the earliest surviving copies from the end of the fourteenth century. The text is the first instance of a defence of a western European vernacular, defending the spoken Irish language over Latin, predating Dante's De vulgari eloquentia by several hundred years. Source: Wikipedia (en)