To those of you who still doubt the Sicilians

YouTuber and Sicilian-born Metatron has vetted the Sicilian-voice lines in Age2 to be authentic Sicilian.
Sicilian Guy Tries the Sicilians in Age of Empires 2! - YouTube

Devs of Forgotten Empires thanked Metaton commenting on his video: "Devs here, we’re very happy to hear the Sicilian language in AoE2 got your seal of approval!"