Django i18n changing site language

via_button.html

<form action="{% url 'set_language' %}" method="post">
  {% csrf_token %}
  <input name="next" type="hidden" value="{{ request.get_full_path|slice:'3:' }}" />
  <input name="language" type="hidden" value="es" />
  <input type="submit" value="ES" />
</form>

via_select.html

<form action="{% url 'set_language' %}" method="post">
  {% csrf_token %}
  <input name="next" type="hidden" value="{{ request.get_full_path|slice:'3:' }}" />
  <select name="language">
    {% get_language_info_list for LANGUAGES as languages %}
      {% for language in languages %}
        <option value="{{ language.code }}"{% if language.code == LANGUAGE_CODE %} selected="selected"{% endif %}>
          {{ language.name_local }} ({{ language.code }})
        </option>
      {% endfor %}
  </select>
  <input type="submit" value="Change" />
</form>