title: Django-CMS static placeholder not working in site with translations
body: <p>I have a site with Django/Django-CMS that has 3 languages and I've got a static placeholder for the newsletter form. The problem is that I add the plugin to this placeholder in my <code>pt</code> page and then edit the content in the other pages (<code>en</code> and <code>es</code>) so the text is translated and publish my changes. The problem is that in edit mode the changes appear but in publish mode it always assumes the <code>pt</code> translation. In the other placeholders (not static) this doesn't happen. I can't have static placeholders with translations?</p>
  
  <p>UPDATE:</p>
  
  <p>Here's a print of my plugin ID from the <code>pt</code> page:</p>
  
  <p><a href="https://i.stack.imgur.com/XqevP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XqevP.png" alt="&lt;code&gt;pt&lt;/code&gt; ID of my plugin"></a></p>
  
  <p>And here's the ID of the <code>en</code> page:</p>
  
  <p><a href="https://i.stack.imgur.com/CA5Xo.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CA5Xo.png" alt="&lt;code&gt;en&lt;/code&gt;ID of my plugin"></a></p>
  
  <p>My static placeholder is defined like this:</p>
  
  <pre><code>{% static_placeholder "subscribe" %}
  </code></pre>
  
  <p>And I have 3 languages defined:</p>
  
  <pre><code>LANGUAGES = [
      ('pt', gettext('pt')),
      ('en', gettext('en')),
      ('es', gettext('es')),
  ]
  
  CMS_LANGUAGES = {
      ## Customize this
      'default': {
          'public': True,
          'hide_untranslated': False,
          'redirect_on_fallback': True,
      },
      1: [
          {
              'public': True,
              'code': 'pt',
              'hide_untranslated': False,
              'name': gettext('pt'),
              'redirect_on_fallback': True,
          },
          {
              'public': True,
              'code': 'en',
              'hide_untranslated': False,
              'name': gettext('en'),
              'redirect_on_fallback': True,
          },
          {
              'public': True,
              'code': 'es',
              'hide_untranslated': False,
              'name': gettext('es'),
              'redirect_on_fallback': True,
          },
      ],
  }
  </code></pre>