The young parlers in the multicultural Ile-de-France (2017), a book coordinated by Françoise Gadet, leaves in the ‘Le essentiel’ collection, where the author had already published La Variation Sociale in French (2003, and 2007 for the second edition) and Le Française in contact with other languages (2015), written in collaboration with Ralph Ludwig. It relates to what Boyer (1997) calls a ‘mediatically identified object’, namely ‘young parlers’, with the aim of studying the effects of the situation...