{% load i18n language_code %}

<div class="dropdown">
    <form action="{% url 'set_language' %}" method="post">
        {% csrf_token %}
        <button class="btn btn-tertiary dropdown-toggle" type="button" id="languageDropdown" data-bs-toggle="dropdown" aria-expanded="false">
            {% get_current_language as LANGUAGE_CODE %}
            {% get_language_info_list for LANGUAGES as languages %}
            {{ LANGUAGE_CODE|get_language_code:languages }}
        </button>
        <ul class="dropdown-menu dropdown-menu-end" aria-labelledby="languageDropdown">
            {% for lang in languages %}
                <li>
                    <button class="dropdown-item" type="submit" name="language" value="{{ lang.code }}">{{ lang.name }}</button>
                </li>
            {% endfor %}
        </ul>
    </form>
</div>