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copied!<p>What do you mean by "without extra modules"?</p> <p>Here is a solution with <code>use Unicode::Normalize;</code> <a href="http://perldoc.perl.org/Unicode/Normalize.html" rel="nofollow">see on perl doc</a></p> <p>I removed the "ţ" and the "ļ" from your string, my eclipse didn't wanted to save the script with them.</p> <pre><code>use strict; use warnings; use UTF8; use Unicode::Normalize; my $str = "Îñtérñåtîöñålîžåtîöñ"; for ( $str ) { # the variable we work on ## convert to Unicode first ## if your data comes in Latin-1, then uncomment: #$_ = Encode::decode( 'iso-8859-1', $_ ); $_ = NFD( $_ ); ## decompose s/\pM//g; ## strip combining characters s/[^\0-\x80]//g; ## clear everything else } if ($str =~ /nation/) { print $str . "\n"; } </code></pre> <p>The output is </p> <blockquote> <p>Internationaliation </p> </blockquote> <p>The "ž" is removed from the string, it seems not to be a composed character.</p> <p>The code for the for loop is from this side <a href="http://ahinea.com/en/tech/accented-translate.html" rel="nofollow">How to remove diacritic marks from characters</a></p> <p>Another interesting read is <a href="http://www.joelonsoftware.com/articles/Unicode.html" rel="nofollow">The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets (No Excuses!)</a> from Joel Spolsky</p> <p><strong>Update:</strong></p> <p>As @tchrist pointed out, there is a algorithm existing, that is better suited, called UCA (Unicode Collation Algorithm). @nordicdyno, already provided a implementation in his question.</p> <p>The algorithm is described here <a href="http://www.unicode.org/reports/tr10/" rel="nofollow">Unicode Technical Standard #10, Unicode Collation Algorithm</a></p> <p>the perl module is described here on <a href="http://perldoc.perl.org/Unicode/Collate.html#DESCRIPTION" rel="nofollow">perldoc.perl.org</a></p>

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