The french site http://www.extreme-studio2cine.fr/ incorporates a text-to-speech app in flash which outputs stunning french voices which indeed sound very real. Worth a mention…havent seen anything like it in flash so far.

Go to the site start editing the video. Add audio.enter some French text. (obviouly the text needs to be french…as the pronounciation is french.

i.e. je ne sais pas. J’habites a Paris.
prendre les jambes à son cou