We investigated changes in self-representation depending on language in Friulian–Italian bilinguals. The Temperament and Character Inventory (TCI) and the Junior-TCI were administered respectively to 24 adults and 25 children, both in Friulian and in Italian, at a distance of two weeks from each other. Variations in TCI were detected: both adults and children scored higher in Self-Directedness (a character trait) when using Italian than Friulian. Similar findings were observed for Novelty-Seeking (a temperament trait) in children and Cooperativeness (another character trait) in adults. Results are discussed considering previous studies on bilingualism and within the frame of the Friulian sociolinguistic context.