Here's the blend file: http://pasteall.org/blend/index.php?id=44670. If you keyframe the location of the letter "I" at a different location and then move the greenbar the rest of the letters will follow its origin. I've been looking for answers on the internet and can't find a solution.
All the letters have strips in the NLA Editor which share the same action:
But this action contains nothing so it looks like the letters aren't animated. For this same reason you can use Remove Emtpy Animation Data option to remove all the empty strips: