We're working on getting some context based on the original English string, where you can just search for the English phrase and see what pages it appears on. Not perfect, but it's a start.
I believe that particular string is
somewhere in a moderator tool in the recently introduced self-service account action feature , though I can't quite find it. If you encounter a situation where you just can't find context to translate you can (1) skip it or (2) skip it and open an issue in Transifex asking for context.
Don't worry too much about skipping if unsure, as the translation progresses and people begin using the site, they will quickly report strings still in English and where they were found - nothing that people actually see will go untranslated for long.
Since the place where this shows up is complicated, and all strings associated with it are extremely difficult to understand out of the context of the UI itself, we're going to go ahead and test the self-service account actions just to make sure the wording is right:
This is one place that we don't want to get it horribly wrong, because it lets users do things to their accounts that is a bit of a pain to undo :)
Thank you for helping with translations, especially on a weekend!