So I propose a four field scheme: language, *application*, key, message.
application would be something like the groups in the translatewiki, right?
the translatewiki offers a php output for groups, e.g. for MediaWiki -
Messages
http://translatewiki.net/w/i.php?title=Special%3ATranslate&task=export-…
.
eventually we can use that to sync?
--Luxo