[gentoo-user] K3b complains about my locale

[Kevin O'Gorman]

When I crank up K3b, it complains about my setup, with the message

    "System locale charset is ANSI_X3.4-1968
    Your system's locale charset (i.e. the charset used to encode filenames)
is set to ANSI_X3.4-1968. It is highly unlikely that this has been done
intentionally.
    Most likely the locale is not set at     all. An invalid setting will
result in problems when creating data projects.
    Solution: To properly set the locale charset make sure the LC_*
environment variables are set. Normally the distribution setup tools take
care of this."

It is correct that this is not intentional (it does seem antique).  I have
configured .mybashrc to set my LANG to "en_US", but nothing beyond that.
What "distribution setup tools" is it referring to, so that I can correct
this on gentoo?

++ kevin