Translation set form
To most of my users, and to a certain extent for me, the "translation set" form is still not comprehensible.
I know it's useful, I know. I am just talking of usability.
As far as I know my users, if they decide to translate a page, they would at best be able to handle a form consisting in a scrolling list of the languages they want to translate into.
Facing the present "Translation set" form means that in practice they will stop there, and they won't translate.