`under the same title. Das Kapital is the title I hear it referred to as.   ::Well, yes... Most of his other works were given German titles too. They were written in German. But we don't have articles called Bearbeiten von Kritik der politischen Ökonomie, Thesen über Feuerbach or Manifest der Kommunistischen Partei. Those are always referred to by their translated, English, titles. Conversely, the Grundrisse is only ever known by its original German title. In the case of Capital, usage is mixed. The English title is overwhelmingly preferred by Marx scholars, communists, academics etc. Whether this equates to ``common usage`` is debateable however`