I was asked to take a gander at #761284. I was unable to reproduce that bug, but I ran into two problems while trying to do so:
1.) We hide the "New Deployable from Image" button for imported images. This was a bug I introduced earlier. There's no reason you can't do this, and its absence renders importing images rather pointless.
2.) There was an error showing on the page to create a new deployable about missing translations.
To be clear, this is _not_ a fix for #761284 itself, but merely two previously-unnoticed bugs that I uncovered trying to get there.
This is a trivial fix that I would normally self-ACK, but I'm going to hold off until Monday to avoid stomping on jzigmund's toes since he owns the BZ.
-- Matt