Description of problem:

As per shughes:  When you change your locale preference in the browser, its not taking effect on the app. So if you choose ja for Japanese you should see at least some japanese chars. Currently japanese is only 59% complete, but we should see translations pop up on parts of page. The problem is the strings were not getting properly loaded due to format of po. Rails was looking for a default of yml or rb

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1. for FF, go to edit->preferences->content->languages
2. add a language...you need to make sure your preferred lang is at top
3. Browse the web ui
  
Actual results:


Expected results:


Additional info: