Here’s a plugin for phpHyphenator

<?php
// Author:  N David Brown
// License: Freely distributable
//
// Description: Plugin for soft hyphenation of text under ExpressionEngine, using phpHyphenator
//
// Usage:
//
//  i.      Download phpHyphenator latest version from
//
//              http://yellowgreen.de/phphyphenator
//
//  ii.     Extract phpHyphenator to its own directory, then place anywhere within webroot on
//          server
//
//  iii.    Place this file (pi.hyphenator.php) into your ExpressionEngine plugins directory
//          (usually webroot/system/plugins)
//
//  iv.     Modify MY_WEBROOT and MY_PATH_HYPHENATOR accordingly - inline comments explain how
//          (see below in $GLOBALS declarations)
//
//  iii.    Wrap (X)HTML you wish to be soft hyphenated with '{exp:hyphenator}' tags, e.g.
//
//                  {exp:hyphenator}<div></div>{/exp:hyphenator}
//
//  Notes:  If you do not set charset UTF-8 in your HTML within a content-type metatag, you should
//          uncomment the 'header(...)' line in the code below, since phpHyphenator requires UTF-8
//
//
//  For example of phpHyphenator in action, please visit
//
//              http://www.buildingfrombelow.org
//
//      
// Copyright of N David Brown, Jun 2009. Contact: developerdave _at_ gmail _dot_ com

// replace 'change_me' with path to webroot, e.g. /path/to/public_html, or /path/to/htdocs
$GLOBALS["MY_WEBROOT"] = 'change_me';

// replace 'change_me' with path to php hyphenator directory, relative to webroot
$GLOBALS["MY_PATH_HYPHENATOR"] = $GLOBALS["MY_WEBROOT"].'change_me';

$GLOBALS["path_to_patterns"] = $GLOBALS["MY_PATH_HYPHENATOR"].'/patterns/';
$GLOBALS["dictionary"] = $GLOBALS["MY_PATH_HYPHENATOR"].'/dictionary.txt';

include $GLOBALS["MY_PATH_HYPHENATOR"].'/hyphenation.php';

class Hyphenator
{
    var $return_data = "";

    function Hyphenator()
    {
        global $TMPL;
        //header('content-type: text/html; charset=utf-8');
        $this->return_data = hyphenation($TMPL->tagdata);
    }
}
?>