{% load i18n %}
<section class="top-libraries row">
  {% for lang in top_languages %}
    <section class="col-md-4">
      <div class="well">
        <ul class="list-unstyled libraries-list">
          {% for lib in lang.top_libraries %}
            <li>
              <a href="{{ lib.get_absolute_url }}">{{ lib.name }}</a>
              <small title="{% trans 'Total users' %}">({{ lib.total_users }})</small>
            </li>
          {% endfor %}
        </ul>
      </div>
    </section>
  {% endfor %}
</section>

{% load i18n %}
<section class="top-libraries row">
  {% for lang in top_languages %}
    <section class="col-md-4">
      <div class="well well-sm">
        <h4>{{ lang.name }}</h4>
        <ul class="list-unstyled libraries-list">
          {% for lib in lang.top_libraries %}
            <li>
              <a href="{{ lib.get_absolute_url }}">{{ lib.name }}</a>
              <small title="{% trans 'Total users' %}">({{ lib.total_users }})</small>
            </li>
          {% endfor %}
        </ul>
      </div>
    </section>
  {% endfor %}
</section>

Add title for top libs blocks
Add title for top libs blocks
