Note, this is what renders on the resulting wiki page, not something that you see on the command line.
Since dot supports UTF-8, I would expect this to work.
-I'm unsure if this is a bug in the graphviz plugin, or in the perl module it depends upon, but since the graphviz pugin seems to be perl5‽ I figured I would start by reporting the problem here, on the assumption that the older perl was less likely to handle UTF-8.
+I'm unsure if this is a bug in the graphviz plugin, or in the perl module it depends upon, but figured I would start here.