Move heading to language form snippet.

biscuit/core/templates/core/language_form.html

 {% load i18n %}
+<h5>{% blocktrans %}Language{% endblocktrans %}</h5>
 
 <form action="{% url 'set_language' %}" method="post">
   {% csrf_token %}

biscuit/core/templates/footer-menu.html

@@ -33,6 +33,5 @@
 {% endfor %}
 
 <div class="col">
-  <h5>{% blocktrans %}Language{% endblocktrans %}</h5>
   {% include 'core/language_form.html' %}
 </div>