Please add the following files to po/POTFILES.in for your
module :

> libgnome/schemas/desktop_gnome_accessibility_keyboard.schemas.in
> libgnome/schemas/desktop_gnome_applications_browser.schemas.in
> libgnome/schemas/desktop_gnome_applications_help_viewer.schemas.in
> libgnome/schemas/desktop_gnome_applications_terminal.schemas.in
> libgnome/schemas/desktop_gnome_applications_window_manager.schemas.in
> libgnome/schemas/desktop_gnome_background.schemas.in
> libgnome/schemas/desktop_gnome_file_views.schemas.in
> libgnome/schemas/desktop_gnome_interface.schemas.in
> libgnome/schemas/desktop_gnome_peripherals_keyboard.schemas.in
> libgnome/schemas/desktop_gnome_peripherals_mouse.schemas.in
> libgnome/schemas/desktop_gnome_sound.schemas.in
> libgnome/schemas/desktop_gnome_url_handlers.schemas.in


Otherwise they will not get picked up for translation if they contain
translatable content. Instructions for adding .schemas translation support
is here :
http://mail.gnome.org/archives/gnome-hackers/2002-May/msg00160.html