For more than two decades, Sciences Po’s Centre for International Studies (CERI) has pursued an active policy of encouraging academic publications in French and, since the late 1990s, in English. In 2002, the CERI founded the Series in International Relations and Political Economy with Palgrave Macmillan. Today, we celebrate 20 years of a valuable partnership and 50 books published in English, including both translations and original works written directly in English! We take a look back at the creation of this series, what it has achieved, and why it is important to continue encouraging CERI scholars to publish in English, a policy which, like other mechanisms, promotes the internationalisation of the research conducted at CERI. The following is an interview with the creator of the series, Christophe Jaffrelot.