This article analyzes the metalexicographic treatment of Acadian particularisms in four contemporary French language dictionaries of the 21st century, to identify their respective metadiscourses on the legitimacy of the Acadian variety and its lexicon. First, we analyzed the introductory texts of the four dictionaries. We then studied their nomenclatures using a pre-established list of the Acadian French lexicon, from a panfrancophone lexicographic database: Base de données lexicographiques panfrancophone (Dubois & Chevalier, 2006). Our results demonstrate that the dictionaries treat different varieties of French unevenly and point to the presence of an emerging standard Acadian French, characterized by legitimate words, different registers and sociolinguistic interactions with other French varieties.