Control Panel » Permission Checks
Look near the bottom of the list for languages, there should be like two of them.
If it is not showing ok then it is a a file permission issue.
You can click on the line item to expand the list if it is just one file that has the problem it will show which ones are not set correctly.
In my case folders are 755 and the files are set to 644
Last edited by Ruben; 06/01/2009 3:25 PM. Reason: Added comment