diff -upr mate-control-center/font-viewer/font-view.c mate-control-center-test/font-viewer/font-view.c

--- mate-control-center/font-viewer/font-view.c	2015-08-30 16:48:52.659974372 +0200

+++ mate-control-center-test/font-viewer/font-view.c	2015-08-30 16:48:20.740638000 +0200

@@ -458,7 +458,7 @@ info_button_clicked_cb (GtkButton *butto

     populate_grid (self, grid, face);

-    dialog = gtk_dialog_new_with_buttons ("", GTK_WINDOW (self->main_window),

+    dialog = gtk_dialog_new_with_buttons ( _("Info"), GTK_WINDOW (self->main_window),

                                           GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT,

                                           GTK_STOCK_CLOSE, GTK_RESPONSE_CLOSE,

                                           NULL);