website/_includes/sidebar.html

<div id="mySidenav" class="sidenav">
  <a href="javascript:;" class="closebtn">&times;</a>
  {% if site.lang == "it" %}
      <a class="text-decoration-none" href="{% translate_link {{ page.namespace }} en %}">🇬🇧</a>
  {% else %}
      <a class="text-decoration-none" href="{% translate_link {{ page.namespace }} it %}">🇮🇹</a>
  {% endif %}
  <a class="btn-outline-primary" href="{% translate_link aboutus %}">{% t buttons.about_us %}</a>
  <a class="btn-outline-primary" href="{% translate_link services-and-products %}">{% t buttons.services_and_products %}</a>
  <a class="btn-outline-primary" href="{% translate_link technical-assistance %}"> └  {% t buttons.technical_assistance %}</a>
  <a class="btn-outline-primary" href="{% translate_link cybersecurity %}"> └  {% t buttons.cybersecurity %}</a>
  <a class="btn-outline-primary" href="{% translate_link communications %}"> └  {% t buttons.communications %}</a>
  <a class="btn-outline-primary" href="{% translate_link projects %}">{% t buttons.projects %}</a>
  <a class="btn-outline-primary" href="{% translate_link contactus %}">{% t buttons.contactsus %}</a>
</div>