Hello,
As a member of the Braillenet translation group for "Understanding WCAG 2.0", I confirm that I have in fact reviewed the document "Version
française, 20 mai 2011 : Comprendre les WCAG 2.0" at
http://www.braillenet.org/accessibilite/comprendre-wcag20/CAT20110520>
and I consider it to be an accurate translation.
Best regards,

Jean-Pierre Villain