I tried this, in the hope that it would give a French output:
jb@jb-x200:~$ LC_ALL=FR sudo /usr/share/doc/libdvdread4/install-css.sh [sudo] password for jb: sudo: /usr/share/doc/libdvdread4/install-css.sh: command not found It did not (don't mind the command itself) But it did give me an English output in a Danish environment
