title: Insert variable into django translate field
body: <p>They ask me to modify a web which I don't realy know how it was done, but it's made using django. I don't know much about python or django, so this question may be simpel. But I have this line whitch is translated in a po file:</p>
  
  <pre><code>&lt;h3 class="event-title"&gt;{{ event.length.duration }} {% trans "WEEK PROGRAM" %}&lt;/h3&gt;
  </code></pre>
  
  <p>I need to modify it to insert the event.length.duration inside the text, something like this:</p>
  
  <pre><code>{% trans {{ event.length.duration }} " WEEK PROGRAM" %}
  </code></pre>
  
  <p>Any Suggestion? Thanks</p>
  
  <p>Edit:</p>
  
  <p>Thanks to catavaran this question is solved.</p>