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This is an excerpt from the latest version perlfaq6.pod, which
comes with the standard Perl distribution. These postings aim to
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6.8: How can I match a locale-smart version of "/[a-zA-Z]/"?

You can use the POSIX character class syntax "/[[:alpha:]]/" documented
in perlre.

No matter which locale you are in, the alphabetic characters are the
characters in \w without the digits and the underscore. As a regex, that
looks like "/[^\W\d_]/". Its complement, the non-alphabetics, is then
everything in \W along with the digits and the underscore, or


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