Django admin site lang switcher

base_site.html

<!-- {templates_dir}/admin/base_site.html -->
{% extends "admin/base.html" %}
{% load i18n %}

{% block title %}{{ title }} | {{ site_title|default:_('Django site admin') }}{% endblock %}

{% block branding %}
<h1 id="site-name"><a href="{% url 'admin:index' %}">{{ site_header|default:_('Django administration') }}</a></h1>
{% endblock %}

{% block usertools %}
{% if has_permission %}
<div id="user-tools">
    {% block welcome-msg %}
        {% trans 'Welcome,' %}
        <strong>{% firstof user.get_short_name user.get_username %}</strong>.
    {% endblock %}
    {% block userlinks %}
        {% get_current_language as cur_lang %}
        {% get_available_languages as langs %}
        [
        {% for lang in langs %}
            {% if lang.0 == cur_lang %}
                <strong>{{ lang.0 }}</strong>
            {% else %}
                <a href="?langswitch={{ lang.0 }}">{{ lang.0 }}</a>
            {% endif %}
            {% if not forloop.last %}|{% endif %}
        {% endfor %}
        ] /
        {% if site_url %}
            <a href="{{ site_url }}">{% trans 'View site' %}</a> /
        {% endif %}
        {% if user.is_active and user.is_staff %}
            {% url 'django-admindocs-docroot' as docsroot %}
            {% if docsroot %}
                <a href="{{ docsroot }}">{% trans 'Documentation' %}</a> /
            {% endif %}
        {% endif %}
        {% if user.has_usable_password %}
        <a href="{% url 'admin:password_change' %}">{% trans 'Change password' %}</a> /
        {% endif %}
        <a href="{% url 'admin:logout' %}">{% trans 'Log out' %}</a>
    {% endblock %}
</div>
{% endif %}
{% endblock %}

{% block nav-global %}{% endblock %}