+=item Locale '%s' contains (at least) the following characters which
+have unexpected meanings: %s The Perl program will use the expected
+meanings
+
+(W locale) You are using the named UTF-8 locale. UTF-8 locales are
+expected to have very particular behavior, which most do. This message
+arises when perl found some departures from the expectations, and is
+notifying you that the expected behavior overrides these differences.
+In some cases the differences are caused by the locale definition being
+defective, but the most common causes of this warning are when there are
+ambiguities and conflicts in following the Standard, and the locale has
+chosen an approach that differs from Perl's.
+
+One of these is because that, contrary to the claims, Unicode is not
+completely locale insensitive. Turkish and some related languages
+have two types of C<"I"> characters. One is dotted in both upper- and
+lowercase, and the other is dotless in both cases. Unicode allows a
+locale to use either the Turkish rules, or the rules used in all other
+instances, where there is only one type of C<"I">, which is dotless in
+the uppercase, and dotted in the lower. The perl core does not (yet)
+handle the Turkish case, and this message warns you of that. Instead,
+the L<Unicode::Casing> module allows you to mostly implement the Turkish
+casing rules.
+
+The other common cause is for the characters
+
+ $ + < = > ^ ` | ~
+
+These are probematic. The C standard says that these should be
+considered punctuation in the C locale (and the POSIX standard defers to
+the C standard), and Unicode is generally considered a superset of
+the C locale. But Unicode has added an extra category, "Symbol", and
+classifies these particular characters as being symbols. Most UTF-8
+locales have them treated as punctuation, so that L<ispunct(2)> returns
+non-zero for them. But a few locales have it return 0. Perl takes
+the first approach, not using C<ispunct()> at all (see L<Note [5] in
+perlrecharclass|perlrecharclass/[5]>), and this message is raised to notify you that you
+are getting Perl's approach, not the locale's.
+