Weblate 1.3 will bring several new features. One of recently implemented parts is source strings review.
Translators quite often find some problems with original string. Be it typo, wrong wording or simply the message is hard to understand. In Weblate 1.3 they will have an option to push feedback to developers. The feedback is stored within Weblate and optionally can be sent to configured email.
In addition to this, there are now checks for source strings as well, which might help you to improve quality of them. New checks are of course covered in the documentation.
You can already try current Weblate on http://demo.weblate.org/, though there are still some things which need polishing.