A few new dictionaries I found on the stardict website doesn't have a corresponding ebuild. The langdao dictionaries have gb versions too. Just change the big5 references to gb in the ebuild. Reproducible: Always Steps to Reproduce:
Created attachment 23582 [details] langdao english to chinese dictionary (new)
Created attachment 23583 [details] langdao chinese to english dictionary (new)
Created attachment 23584 [details] oxford big5 dictionary (not new but portage only has gb version)
These ebuilds have been commited some time ago. Closing.