How can I allow HTML links in translated strings?
the problem is the absence of the quotes. I try to insert this traslation on a drupal site and it work!  

&lt;p&gt;Some explanations here. You can find a more information 
 &lt;a href='@hhelp'&gt;on the help page&lt;/a&gt;.&lt;br&gt;Note: after changing this 
  value,you may have to &lt;a href='@hperformance'&gt;clear the cache&lt;/a&gt; 
  for this setting to take effect.&lt;/p&gt;


It also work with "