This chapter considers how the Catalan chronicler Ramon Muntaner used the Occitan language to represent the three dynasties of the House of Barcelona-Aragon, as well as those Sardinians who supported the Catalan-Aragonese invasion of their island in 1323. Muntaner only used the Occitan language once in his Cronica in the form of a Sermo to provide military advice to King James II of Aragon (r. 1291–1327) and his son Prince Alfonso, the future King Alfonso the Benign (r. 1327–1336). His use of the Occitan language could be interpreted as a continuation of the ideology established by Desclot in his Cronica, in which Occitan had been described as a language that did not represent a stable political identity. Muntaner exploits this ideology by employing Occitan to highlight the unity of the House of Barcelona-Aragon. While the conquest of Sicily in 1282 was predominantly a Catalan enterprise, this time Muntaner wishes to emphasize that the whole Crown of Aragon in the Iberian Peninsula and the Kingdom of Majorca have united to conquest Sardinia. The Sermo also relies upon the Occitan language to include and exalt the inhabitants of Sardinia who supported the Catalan-Aragonese invasion. The political discontinuity of Occitan that appears in Desclot and Muntaner’s accounts exalts how the Catalan language represents the Catalan-Aragonese monarchy.