title: cakePHP language routing
body: <p>What I'm trying to achieve is that I can change only language prefix in the url, but getting problems...
  There is my routes:</p>
  
  <pre><code>$lang_regexp = implode('|', Configure::read('Config.languages'));
  Router::connect('/', array('controller' =&gt; 'languages', 'action' =&gt; 'choose'));
  Router::connect('/:lang/:controller/:action/*',
                 array(),
                 array('lang' =&gt; $lang_regexp));
  
  
  // actual default page; can be any controller
      Router::connect('/:lang/pages/ajax_newsletter', array('controller' =&gt; 'pages', 'action' =&gt; 'ajax_newsletter'));
      Router::connect('/:lang/',
      array('controller' =&gt; 'pages', 'action' =&gt; 'index',  'home'),
      array('lang' =&gt; $lang_regexp));
      Router::connect('/:lang/:slug', array('controller' =&gt; 'pages', 'action' =&gt; 'pages'), array('lang' =&gt; $lang_regexp));
      Router::connect('/:slug', array('controller' =&gt; 'pages', 'action' =&gt; 'pages'), array('lang' =&gt; $lang_regexp));
  
      Router::connect('/:lang/special_offers', array('controller' =&gt; 'pages', 'action' =&gt; 'offers'));
      Router::connect('/:lang/special_offers/*', array('controller' =&gt; 'pages', 'action' =&gt; 'offers_city'));
      Router::connect('/:lang/news/*', array('controller' =&gt; 'pages', 'action' =&gt; 'news_article'));
      Router::connect('/:lang/news', array('controller' =&gt; 'pages', 'action' =&gt; 'news'));
      Router::connect('/:lang/:slug/:id/*', array('controller' =&gt; 'pages', 'action' =&gt; 'offers'), array('lang' =&gt; $lang_regexp));
  
      Router::connect('/cities/select', array('controller' =&gt; 'cities', 'action' =&gt; 'select'));
      Router::connect('/cities/select/*', array('controller' =&gt; 'cities', 'action' =&gt; 'select'));
  </code></pre>
  
  <p>my language switcher:</p>
  
  <pre><code>$this-&gt;html-&gt;link($this-&gt;html-&gt;image('flag_ru.gif',  array("alt"=&gt;"", "width"=&gt;"14px", "height"=&gt;"12px", "title"=&gt;"")), array("lang" =&gt; "rus"), array('escape' =&gt; false));
  </code></pre>
  
  <p><code>:lang/:slug</code> is menu entry so if I have menu like <code>localhost/eng/contact</code> after language change I get <code>localhost/rus/pages/pages</code>... How to change only language prefix?</p>