Hi Danishka, Charles,
I see. For the l10n page Rafaella, who is in copy, will help you insert the Sinhala entry in the list.
well actually we moved all this inforamtion to the wiki some time ago.Danishka, you can go ahead and update the information at: http://wiki.services.openoffice.org/wiki/Languages
If you need any help with this just let me know, Rafaella
For the NLC listing, Louis will change the enty and add your name. Best, Charles.