Kickstart Advanced Options page still lists langsupport, but according to RHEL 5 documentation this is now deprecated and will cause the kickstart to halt:

http://www.redhat.com/docs/manuals/enterprise/RHEL-5-manual/Installation_Guide-en-US/s1-kickstart2-options.html


Steps to Reproduce:
1. Create a RHEL 5 based kickstart distribution and affiliated profile. (CentOS 5 will work)
2. View profile and go to Advanced Options.
  
Actual results:

langsupport option is included.

Expected results:

langsupport should not be here, nor for any Fedora based profiles. For RHEL 4 and lower, it should remain.

Additional info:

In testing it can help to just view your kickstart distribution and change the Installer Generation, regardless of what the distribution contains, and then view the details for your profile again.