The goal of this volume is to present a collection of papers illustrating state-of-the-art research on prosody and affective speech in French and in English. The volume is divided into two parts. The first part focusses on the sociolinguistic parameters that can influence the manifestation and the interpretation of affective speech in prosody. The second part relies on the way emotion recognition is implemented in synthesis systems and how machine applications can contribute to a better description of emotion(s).