 Language proficiency assessment To assess language immersion, participants will be asked for the age of acquisition, how long they lived in a region where French and English language was spoken, the language spoken in family, in childhood, in current daily life, and if the language was acquired in or out of school. In the self-evaluation part, participants will indicate in an analogue scale from 1 to 100 how they estimate their reading, speaking, comprehension and writing skills. Moreover, a sub-test from the computer-based DIALANG language diagnosis system will be used to evaluate reading performance. 