As mentioned previously (and indeed, that one was pointed out by Mark Evanier as well), Laurel and Hardy shot their films in English, then would go back and re-shoot them reading their lines, now in a foreign language, phonetically written on blackboards off-camera.
some shots of them the trailer from Pardon Us, now in German. (The footage we originally had was taken down–so we’ve gone with the trailer. Just a headsup: there’s a bit in blackface. Recall this was 1931. Times were different.)