{%- assign has_sub_categories = false -%}

{%- for cat in talk.categories -%}
  {%- if cat != main_cat -%}
    {%- assign has_sub_categories = true -%}
    <span class="badge badge-light text-reset font-weight-normal">{{ cat }}</span>&nbsp;
  {%- endif -%}
{%- endfor -%}