[tex-hyphen] Hyphenation of polytonic Greek (expressed in Unicode)

[Arthur Reutenauer]

> Thank you, Arthur :  much appreciated.  I note (with regret) that
> the current source (a Microsoft Excel document) contains no
> explicit language tagging

  Since you'll be using XeTeX, you can take advantage of the fact that
the two languages you'll be working with use disjoint character sets,
and make the language switch automatic using XeTeX's inter-character
token mechanism.

	Arthur