CMS Plone
Plone is built from the ground up with focus on internationalization (over 35 translations are currently available) and accessibility for sight and motor impaired individuals.
Zope itself is written in Python , an easy-to-learn, widely-used and supported Open Source programming language. Python can be used to add new features to Plone, and used to understand or make changes to the way that Zope and Plone work.
Plone is the preferred CMS of NASA and CIA . The websites, which use Plone are on this list.