Final answer:
After the Norman Conquest, English kings and the aristocracy primarily spoke French, with Latin, Greek, Arabic, and Hebrew also used in Norman Sicily during King Roger II's reign.
Step-by-step explanation:
After the Norman Conquest, the English kings and the new aristocracy primarily spoke French, as Normandy was a region in northern France. However, the royal court's affairs were conducted in a range of languages reflecting the multicultural milieu. During the reign of King Roger II in Sicily, for instance, Latin, Greek, Arabic, and Hebrew were used in communication with subjects, and the Norman kings appreciated and incorporated Byzantine and Islamic influences into the culture. The Norman influence significantly shifted the language of English royalty and nobility from Old English, which was spoken by Anglo-Saxons before the conquest, towards a French-dominated linguistic environment, affecting not just communication but also literature, art, and governance practices in the kingdom.