This plugin concatenates part of word after internal link and its body (like in MediaWiki) so when you write [[test]]ing this link will be shown as 'testing' and point to 'test'.

This is my first plugin so it may work bad but I hope it'll be useful.

You may download it from http://shtirlic.com/wiki/_media/plugins:linkext.zip or just copy the source code.

<?php
/**
 * Plugin Linkext: merges links body and its end.
 *
 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
 * @author     Serge Shpikin <shtirlic@shtirlic.com>
 */
 
// must be run within DokuWiki
if(!defined('DOKU_INC')) die();
 
if(!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');
require_once(DOKU_PLUGIN.'syntax.php');
 
/**
 * All DokuWiki plugins to extend the parser/rendering mechanism
 * need to inherit from this class
 */
class syntax_plugin_linkext extends DokuWiki_Syntax_Plugin {
 
    function getInfo(){
      return array(
        'author' => 'Serge Shpikin',
        'email'  => 'ShTiRLiC@shtirlic.com',
        'date'   => '2007-02-12',
        'name'   => 'Link Extension Plugin',
        'desc'   => 'Concatenates links ending and body (a-la MediaWiki) which is useful for Cyrillic languages (like Russian, Ukrainian etc.). Links like [[test]]ing will be shown as "testing" and point to "test"',
        'url'    => 'http://shtirlic.com',
      );
    }
 
    function getType()
    {
      return 'substition';
    }
 
    function getSort()
    {
      return 51;
    }
 
    function connectTo($mode)
    {
      $this->Lexer->addSpecialPattern('\[\[[^\s\|]+?\]\][a-zA-Zа-яА-Я]+?\s',$mode,'plugin_linkext');
    }
 
    function handle($match, $state, $pos, &$handler)
    {
      if ($state == DOKU_LEXER_SPECIAL)
      {
        preg_match('/\[\[(.+?)\]\](.+?)\s/', $match, $data);
        return array($state, $data);
      }
      else
        return array($match, $state, $pos);
    }
 
    function render($mode, &$renderer, $data)
    {
      if($mode == 'xhtml')
      {
        list($state, $match) = $data;
        $spos = strrpos($match[1], ':');
        if (!is_bool($spos))
          $caption = substr($match[1], $spos + 1, strlen($match[1]) - $spos);
        else
          $caption = $match[1];
        if ($state == DOKU_LEXER_SPECIAL)
        {
          $renderer->internallink($match[1], $caption.$match[2]);
          $renderer->doc .= ' ';
        }
        else
        {
          $renderer->doc .= $match;
        }
        return true;
      }
      return false;
    }
}

The problem is that if i write [[test]]ing, alone is colored the word test and ing is not colored.