Different Users, Different Languages

[David Chart]

I'd like to be able to set up two users to use different languages,
English and Japanese, for everything, particularly X11. Both languages
are installed on the system.

So far, I can, by changing /etc/sysconfig/i18n, set everyone to English
or Japanese. However, this isn't what I want. Messing with sudoers to
let the .bash_profile of each user change /etc/sysconfig/i18n would
probably work, but would either be inconvenient (requiring me to type
the password twice, I think), or a security nightmare (if I disable
authentication).

Is there a sensible way to do this? I'm sure there must be, but I don't
know where to look. Pointers welcome.
-- 
David Chart
http://www.dchart.demon.co.uk/
PGP Key: 1786 15B1 53A3 7ED0 CBD4 AFBE 9B61 6D10 46C9 1CBE