/l outside of 'use locale' rarely makes any sense to use.
(see L<The setlocale function>). By default, Perl still behaves this
way for backward compatibility. If you want a Perl application to pay
attention to locale information, you B<must> use the S<C<use locale>>
-pragma (see L<The use locale pragma>) or for just pattern matching, the
+pragma (see L<The use locale pragma>) or, in the unlikely event
+that you want to do so for just pattern matching, the
C</l> regular expression modifier (see L<perlre/Character set
modifiers>) to instruct it to do so.