This is a version of trn-4.0-test77 that has been patched to display UTF-8 reasonably correctly. However, the original “character set” conversions are currently disabled. Bugs that have nothing to do with UTF-8 support are also being worked on, as this is the newsreader I’m actually using (yes, I’ve tried tin and nn, and no, tin is not easier and nn is not better).
Posting is half-working, with Content-Transfer-Encoding declared as 8bit. A more proper fix is the next step.
Further along, the original conversions need to be put back in, but in a way that wouldn’t corrupt UTF-8.
The original README from 4.0-test77 is in README.