Funny you'd mention that. We're putting the final touches to an Open Source Jekyll CMS we've built for ourselves (called Jekyll+) that does just that; give a nicer interface for marketing folks and provide multilingual support out of the box.

Preview of my local copy we're prepping up for a release end of the week: http://i.imgur.com/1VyxGzqr.png

Happy to have you testing it out and give me feedback.