> 1) Are there patterns available for polytonic Greek expressed in
> Unicode (and if so, a link or pointer would be helpful)
Yes, of course.
http://tug.org/svn/texhyphen/trunk/hyph-utf8/tex/generic/hyph-utf8/patterns/tex/hyph-grc.tex?revision=592&view=markup
They ship with every modern TeX distribution. You can instruct TeX
Live to load them into XeTeX when building the format file.
> 2) If a paragraph contains a mixture of both English and polytonic
> Greek, is it possible for both languages to be correctly hyphenated,
> and if so, how ?
Just change \language whenever you switch between English and Greek
(provided both pattern sets have been dumped in the format as hinted
above).
Arthur
