Smarty : translate "date|niceTime" result
<p>I use smart and i use this code now , and it works as well as possible ..</p>

<pre><code>date|niceTime
</code></pre>

<p>but the problem that i want translate this code results .. 
outpot example : 5 days ago 
outpot example after translation : depuis 5 jours </p>