maxtar.github.io/themes/hugo-geekdoc/layouts/partials/language.html

{{ if hugo.IsMultilingual }}
  <span class="gdoc-language">
    <ul class="gdoc-language__selector" role="button" aria-pressed="false" tabindex="0">
      <li>
        {{ range .Site.Languages }}
          {{ if eq . $.Site.Language }}
            <span class="flex align-center">
              <svg class="gdoc-icon gdoc_language"><use xlink:href="#gdoc_language"></use></svg>
              <span>{{ .Lang | upper }}</span>
            </span>
          {{ end }}
        {{ end }}


        <ul class="gdoc-language__list">
          {{ if $.Translations }}
            {{ range $.Translations }}
              <li>
                <a
                  class="flex gdoc-language__entry"
                  title="{{ .Language.LanguageName }}"
                  href="{{ .RelPermalink }}"
                  hreflang="{{ .Lang }}"
                  lang="{{ .Lang }}"
                >
                  {{ .Language.LanguageName }}
                </a>
              </li>
            {{ end }}
          {{ else }}
            {{ range .Site.Languages -}}
              {{ if ne $.Site.Language.Lang .Lang }}
                <li>
                  <a
                    class="flex gdoc-language__entry"
                    title="{{ i18n "language_switch_no_tranlation_prefix" }} {{ .LanguageName }}"
                    href="{{ .Lang | relLangURL }}"
                    hreflang="{{ .Lang }}"
                    lang="{{ .Lang }}"
                  >
                    {{ .LanguageName }}*
                  </a>
                </li>
              {{ end -}}
            {{ end -}}
          {{ end }}
        </ul>
      </li>
    </ul>
  </span>
{{ end }}