For the second generations of teenagers from French speaking African immigrant families, daily intra-family interaction processes play an important role in their linguistic-cultural identity. Indeed, communication in the native language ― just like the code-switching between two or more languages (Arabic, Italian, French) and / or the shift towards dominant Italian ― has an impact on their repertoires, skills, perceptions. The intergenerational transmission of native languages and cultures actually depends on the organization of communication systems between parents and children. Moving away from a description of the acculturation processes identified, this contribution aims to analyze family sociolinguistic dynamics concerning interaction and transmission in and of languages spoken at home. This paper shows the results of the analysis of questionnaires and interviews obtained from five secondary schools in the Marche region. The study is based on a sample of 27 high school students (between 13 and 20) born in Italy from African parents.