The aim of this study is to examine some aspects of the prosodic system of Central African French, a variety of French spoken by L1 speaker of Sango, an African tone language. On the basis of a comparison of acoustic correlates of syllables involved in clashes in corpora of spontaneous Central African French and Standard French, we argue that the former has a hybrid prosodic system that contains traces of the tonal system of Sango, the speakers' L1.