no problem. just for the record, in the admin app the vertical length of the page would be a minor problem for me if the untranslated strings showed before/after the yet translated ones ... 1200 strings before, add a controller, 1250 strings after, also if they are highlighted it's heavy to scroll all over the place :D
Putting them on db will allow also ordering on "creation" time, so last added strings will be optionally shown before others....I think that for medium-to-big projects this "project" would be a very nice addition, both as a separate app (accessing other app languages files asynchronously), module (accessing only the app it's installed into) and maybe finally integrated into admin.