Different situation than in say, natural science. Philosophy is much more diverse in terms of inputs and outputs. When your source materials are in German (Mar

Different situation than in say, natural science. Philosophy is much more diverse in terms of inputs and outputs. When your source materials are in German (Marx, Adorno, Nietzsche, Hegel, Freud, Heidegger, etc.) or French (Deleuze, Badiou, Foucault, etc.) you end up needing to learn those languages to make any serious academic progress. Philosophy is much less fungible than physics, in other words. So while there are no doubt more papers in English, the tradition and institutions in German and French speaking countries are probably more influential.