In the past few weeks the app has been too buggy to even consider a translation (From en-es&es-en). I've been trying to get in touch with some devs in irc (#mediawiki-i18n) without any success, another user told me to go to phabricator but didnt tell me where should I go and phab seem to big for me.
Problems *Apertium doesn't work and when it works (on rare occasions) the auto-save feature is disable, the thing to do from there is refresh the page, only to lose the advanced work (by hand).
I like to note that before this, I've been using the app for at least three months without any serious issue.