Therefore, with this first definition we can arrive at a basic consideration on the subject. Bilingual is not only the individual who masters two, so to speak, “prestigious” linguistic codes (such as English and French): bilingual is also the one who speaks fluently his own national language (like Italian) and the dialect of his region (the Lombard, the Venetian, the Sicilian, etc.).
Being bilingual does not depend on how much those languages are spoken in the world, but on how much those languages have co-existed, from a cognitive point of view, within the mind of the subject in question.