University of Maryland's Research Port - law databases?
I've tried to use Zotero for legal resources in a couple of databases across UMD's Research Port (Hein Online and LexisNexis), and gotten the "translator" errors. I troubleshot per the FAQ, but it still doesn't work. I tried ERIC and Zotero worked in that database.
There is a translator for Hein Online, but it is broken and awaiting a fix. The dev team does not have access to LexisNexis's legal research tools or Westlaw, however there are some other community members working on some of these sites.