Abstract
In this lecture I will try to answer the question of what is bilingual identity. In order to do this, two other questions must first be answered. The first one is "Who is bilingual?"; the second is "What is identity?" Linguists define bilingualism in many different ways. You are bilingual: (1) according to origin, if you have learned two languages in your family from your parents and have used two languages from the beginning of your life; (2) according to language projiciency, if you have come into contact with two languages and master two languages completely or equally well; (3) according to language function, if you can alternate between two languages in most situations according to your own choice and the demands of society; (4) according to attitudes, if you feel yourself to be bilingual and are identified as bilingual by others.