After many months of discussion, a new advanced relationship type for translated or transliterated titles has been created. This proposal hasn’t been fully implemented; a new Release Status for transl*ations that aren’t actual releases still needs to be implemented in the server (there is a vote on the Wiki for the best name for this), and there is still discussion on the -style mailing list about the need for explicit attributes marking translation vs. transliteration, but the basic AR, representing the parts of this proposal that have reached consensus, has finally reached the main server.
Thanks to everybody who participated (and is participating) in this very long and drawn out process.