Research team is working on a new algorithm to recmmend articles based on seed articles. The project is documented at https://meta.wikimedia.org/wiki/Research:Wikipedia_Navigation_Vectors
CX Recommendation tool client need to upgrade to use the new API. The existing 'morelike' algorithm and the new algorithm 'related_articles' need to be provided and measure which gives better results. For this, CX need to randomly pick algorithm and log them in its eventlogging database when a translation is started(Recommendation accepted).
The new schema for translation recommendations is available at http://recommend-test.wmflabs.org/types/translation/spec