ClickHouse/docs/tools/mkdocs-material-theme/partials/flags.html

{% set alt_langs = [['en', 'English'], ['ru', 'Russian'], ['zh', 'Chinese'], ['ja', 'Japanese'], ['fa', 'Farsi']] %}
{% for alt_lang, alt_title in alt_langs %}
  <a class="md-alt-lang{% if alt_lang == config.theme.language %} md-current-lang{% endif %}"
     href="{{ base_url }}/../{{ alt_lang }}/{{ page.url or '' }}" class="md-flex__ellipsis md-header-nav__title"
     title="{{ alt_title }}">
    {% include "assets/flags/" + alt_lang + ".svg" %}
  </a>
{% endfor %}