category.html

<div class="category">
  {%- if page.category_name -%}

    {%- assign category_posts = site.categories[page.category_name] | where: "lang", page.lang -%}
    {%- assign category_translate_key = "views.index." | append: page.category_name | append: "_posts" -%}
    <h1 class="page-heading">{%- include t.html root="posts" key=category_translate_key -%} ({{- category_posts.size | default: "0" -}})</h1>

    {%- if category_posts.size > 0 -%}
      <ul class="post-list">
        {%- for post in category_posts -%}
          <li>
            <h3><a class="post-link" href="{{- post.url | relative_url -}}">{{- post.title | escape -}}</a></h3>
            <span class="post-meta">
              {{- "<strong>Created:</strong> " -}}{%- include utils/datetime/format.html date=post.date lang=post.lang strip_midnight=true -%}
              {%- if post.last_modified_at -%}
                {{- " <strong>Last Modified:</strong> " -}}{%- include utils/datetime/format.html date=post.last_modified_at lang=post.lang strip_midnight=true -%}
              {%- endif -%}
              {%- if post.author -%}
                {{- " <strong>Author:</strong> " -}}{{- post.author }}
              {%- endif -%}
            </span>
            {%- if site.show_excerpts -%}
              {{ post.excerpt }}
            {%- endif -%}
          </li>
        {%- endfor -%}
      </ul>
    {%- endif -%}

  {%- else -%}
    <h1 class="page-heading">No Category Name Set</h1>
  {%- endif -%}

</div>