ese-website/_includes/footer.njk

<footer>
  <div class="footer-container">
    {% set otherLang = page.url | locale_links | first %}
    <a href="{{otherLang.url}}" lang="{{otherLang.lang}}" hreflang="{{otherLang.lang}}">
      {% if otherLang.lang == "de" %}
        Deutsche Version 🇩🇪
      {% else %}
        English Version 🇬🇧/🇺🇸
      {% endif %}
    </a>
    <nav id="footerNav">
      {{ collections.footerNav | pageLang | eleventyNavigation | eleventyNavigationToHtml | safe }}
    </nav>
    <span>
      Design:
      <a href="https://designtoasty.de" target="_blank" rel="noreferrer">Designtoasty</a>
    </span>
    <span>Made with 🧉 and 🌈 in Dresden</span>
  </div>
</footer>

{% css %}
  {% include "footer.css" %}
{% endcss %}