Update; it seems that "Desktop" label can be translated in netbook-launcher PO file. However could be good use the actual name for XDG_DESKTOP_DIR directory, in order to use the same label in file system and in netbook-launcher
Update; it seems that "Desktop" label can be translated in netbook-launcher PO file. However could be good use the actual name for XDG_DESKTOP_DIR directory, in order to use the same label in file system and in netbook-launcher