[Doitsu]

Originally Posted by elibrarian

But I digress: Some of you probably already know it, but maybe it'll help one or another: Library of Congress has a very nice page explaining the MARC21 relators, and somewhere on their pages there are also one with links to various local pages with translations and such.

Unfortunately, the site that you've linked to doesn't contain translations of the MARC Code List for Relators, included in Sigil.
Only a handful of semi-official Dublin Core translation lists exist and none of them include Marc Relators.