There are string in gtkprintunixdialog.ui marked for translation
which are not in gtkprintunixdialog.ui.h.
https://bugzilla.gnome.org/show_bug.cgi?id=708907
N_("Pages per _side:");
N_("Page or_dering:");
N_("_Only print:");
+N_("All sheets");
+N_("Even sheets");
+N_("Odd sheets");
N_("Sc_ale:");
N_("Paper");
N_("Paper _type:");
N_("Output t_ray:");
N_("_Paper size:");
N_("Or_ientation:");
+N_("Portrait");
+N_("Landscape");
+N_("Reverse portrait");
+N_("Reverse landscape");
N_("Page Setup");
N_("Job Details");
N_("Pri_ority:");