The Three Percent Translation Databases are an invaluable resource -- but list only (previously untranslated) works of fiction and poetry, i.e. don't cover much else that appears in English translation.
Admirably David Sledge (on Twitter here) has put together a Theater Translation Database 2008-2015. A lot of these are multiple-play volumes, so the total number of translated plays is somewhat larger, but amazingly there seem to an average of less than thirty translated-drama-volumes appearing annually in English -- a rather limited/disappointing total.
Interesting also -- if perhaps not entirely surprising -- that the big publishers of fiction in translation don't figure very prominently as publishers of drama in translation.
Admirably David Sledge (on Twitter here) has put together a Theater Translation Database 2008-2015. A lot of these are multiple-play volumes, so the total number of translated plays is somewhat larger, but amazingly there seem to an average of less than thirty translated-drama-volumes appearing annually in English -- a rather limited/disappointing total.
Interesting also -- if perhaps not entirely surprising -- that the big publishers of fiction in translation don't figure very prominently as publishers of drama in translation.