Last modified: 2014-07-28 10:46:16 UTC
I tried the article "Illinois" at random from Spanish to Catalan. Clicking or searching for the word "localizado", the Definición box appears for half a second and then disappears again, looking very buggy. I suppose it simply doesn't find any definitions, but it should probably hang around and say so :-)
the url: http://es.wikipedia.beta.wmflabs.org/wiki/Special:ContentTranslation?page=Illinois&from=es&to=ca&targettitle= tested on Firefox 30 on Xubuntu 14.04
Patch: https://gerrit.wikimedia.org/r/149798