This work was awarded the Rave Research Prize for Foreign Cultural Policy. The politically, economically, or scientifically dominant states of the world attach greater importance to the dissemination of their own language for various reasons. Did the German Reich make similar efforts between 1933 and 1945? Was there a specific Nazi language dissemination policy? In fact, such a policy can be described, which accompanied the expansionist policy. What objectives did the Nazis pursue in spreading the German language? What influence did ideological motives have on the shaping of such a policy? What changes can be observed during the twelve years of their rule? This study addresses all these questions based on partially unpublished archival material. The presentation focuses on several country studies that are examined as examples. On this basis, the fundamental lines of German language dissemination policy between 1933 and 1945 become visible.