anneso/layouts/partials/categories.html

<ul class="categories" id="categories">
  <li><a href="/"{{ if or .IsHome .IsPage }} class="actif"{{ end }}>#Tout</a></li>
  {{ $term := .Data.Term }}
  {{- range $name, $items := .Site.Taxonomies.categories }}
  <li>
    <a {{if eq ($name | title) $term }}class="actif" {{ end }}href="{{ "categories/" | relLangURL }}{{ $name | urlize | lower }}/#categories">
      #{{ $name | title | humanize }}
    </a>
  </li>
  {{- end }}
</ul>