How to change the behaviour or display of the language switcher? On translated pages the language switcher shows links to translated languages, but for untranslated languages there is no link, but the name of the language without a link. In the case, that there is no corresponding node in a given language, i would like the language switcher to show a link to the front page instead.

How can i accomplish this behaviour? Thank you very much!
Add next into template.php file of your theme:

&lt;?php 
  function YOURTHEMENAME_links__locale_block($variables) {
    foreach($variables['links'] as $key =&gt; $lang) {
      if (isset($lang['attributes']['class']) &amp;&amp; in_array('locale-untranslated', $lang['attributes']['class'])) {
        // Set here any page link.
        $variables['links'][$key]['href'] = '&lt;front&gt;';
      }
    }
    return theme_links($variables);
  }