Description of Problem:

I have installed Skipjack beta-2 using US-English as my language environment. 
My /etc/sysconfig/i18n file looks like this;

LANG="en_US.iso885915"
SUPPORTED="en_US.iso885915:en_US:en"
SYSFONT="lat0-sun16"
SYSFONTACM="iso15"

The file /etc/profile.d/lang.sh sets LANG on the basis of this file.  Some file,
perhaps /etc/X11/xinit/xinitrc.d/xinput, results in LANG being set to en_US
instead of en-US.iso885915 under certain circumstances including booting into
runlevel 5 and logging in via gdm.

If one attempts to start X with LANG (or perhaps other locale-related variables)
set to en-US.iso885915, you receive multiple instances of this warning:

Warning: locale not supported by Xlib, locale set to C

and some things don't work properly, especially in the area of displaying strings.

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

initscripts-6.61-1, xinitrc-3.20-1

How Reproducible:

always

Steps to Reproduce:
1. boot into runlevel 3
2. log in on the console
3. start X with xinit
4. observe on the vc from which X was started the above warning
5. run twm &
6. notice the title is "Untitled"

Actual Results:

The value of LANG is set to something that is not supported under X

Expected Results:

LANG should be adjusted appropriately within X regardless of whether X was
started by gdm or in some other way.

Additional Information:

I hope my attempt at analysis has not obscured the problem.  It seems that the
whole way in which LANG is set in or out of X is fairly involved and is spread
across multiple locations.  The main issue is that LANG is set badly in X not
started from prefdm (or something similar to that).  This problem was introduced
between skipjack beta-1 and beta-2.