LC_ALL=en_US.utf8 joe
and JOE should think the terminal supports UTF-8 (it will say so on the status line).
http://world.std.com/~jhallen/joe-3.3-2.tar.bz2 http://world.std.com/~jhallen/joe-3.3-2-src.tar.bz2
The setup.hint remains the same:
http://world.std.com/~jhallen/setup.hint