templates-base.html

        {% get_current_language as LANGUAGE_CODE %}
        <div id="lang_section" class="float-right">
          <form action="{% url 'set_language' %}" method="post" id="base-lang-form">
            {% csrf_token %}
            <select name="language" id="base-lang-selector">
              {% for lang in LANGUAGES %}
                <option value="{{ lang.0 }}"{% if lang.0 == LANGUAGE_CODE %} selected{% endif %}>{% trans lang.1 %}</option>
              {% endfor %}
            </select>
          </form>



  <script type="text/javascript">
    $("#base-lang-selector").change(function() {
      $("#base-lang-form").submit();
    });
  </script>

urls.py

urlpatterns = patterns('',
    # Examples:
    # url(r'^$', 'hv.views.home', name='home'),
    # url(r'^hv/', include('hv.foo.urls')),

    # Uncomment the admin/doc line below to enable admin documentation:
    # url(r'^admin/doc/', include('django.contrib.admindocs.urls')),

    # ...
    url(r'^i18n/setlang/$', 'django.views.i18n.set_language', name='set_language'),
    url(r'^admin/', include(admin.site.urls)),
)