Bug 12963

message.texi contains:

The @var{locale} component is computed based on the category used.  Just
like for the @code{setlocale} function here comes the user selection
into the play.  Some environment variables are examined in a fixed order
and the first environment variable set determines the return value of
the lookup process.  In detail, for the category @code{LC_xxx} the
following variables in this order are examined:

@table @code
@item LANGUAGE
@item LC_ALL
@item LC_xxx
@item LANG
@end table

But this is incorrect: LANGUAGE does not always have the precedence over the other variables, as shown below:

ypig% LANGUAGE=fr_FR LC_ALL=en_US cp
cp: opérande fichier manquant
Saisissez « cp --help » pour plus d'informations.
ypig% LANGUAGE=fr_FR LC_ALL=C cp    
cp: missing file operand
Try `cp --help' for more information.