A translator is not a lyricist, but he is displayed here and there as lyricist.
So in translated works it is impossible to discern the translators in the mixed list of writers + translators.
And when a lyricist is also a translator (rare case, but meeting), he appears as lyricist twice, e.g.:
http://musicbrainz.org/artist/1a94e76e-d741-457d-93c1-cd057f1f1bba/works
I think, a translator should be displayed everywhere as translator.