When a user is not logged in and goes to translate any string, he is shown a message You have to log in to edit this translation. this login URL is missing redirect_to parameter.
You have to log in to edit this translation.
This would be beneficial as the UX of Glotpress in a WordPress site seems a bit confusing for a new user. these two look like completely different sites. redirect_to will bring the user back to where he was after successfully logging in.