Changing locale to french make the check answer button in activities disappear

What steps will reproduce the problem?
1. download and run coursebuilder
2. change locale to 'fr' in course.yaml
3. load an activity

What is the expected output? What do you see instead?
Activities are not working, the check button disappears.

What version of the product are you using? On what operating system?
Using coursebuilder 1.3 with windows but issue was present on 1.2. Same issue 
if i deploy my app and modify course.yaml through Dashboard>Setting:Edit

Please provide any additional information below.

Original issue reported on code.google.com by raphael....@gmail.com on 12 Mar 2013 at 2:56

manniru / course-builder

Changing locale to french make the check answer button in activities disappear #30