"Choying Dorje" <firstname.lastname@example.org> correctly
reports that you can't type lon. Or more generally lVn
for any vowel. The bug is this line in
previousWylie = unicode2Wylie(AscW(previous))
The problem is that in this case previous is "lo", due
to Word's idiotic practice of smushing several Unicode
characters into a single Word character. Need to look
at its last character.