How to translate the description metatag for a view
You could add something in the html.tpl.php along these lines:

  &lt;?php
  if((function_exists('views_get_page_view') &amp;&amp; views_get_page_view()) &amp;&amp; ($language-&gt;language == 'fr')){ ?&gt;
      ...Your metatag here...
  &lt;?php  
  }elseif((function_exists('views_get_page_view') &amp;&amp; views_get_page_view()) &amp;&amp; ($language-&gt;language == 'de')){ ?&gt;
      ...Your metatag here...  
  &lt;?php } ?&gt;



  views_get_page_view() finds out what, if any, page view is currently
  in use. If it returns NULL, then the current page is not a views'
  page.


Source

This line of code may come in handy as well, to figure out which view:

$view = views_get_page_view();


Source

Is this enough to help you on the way?