symposion_app/pinaxcon/templates/symposion/emails/speaker_addition/message.html

{% load i18n %}
{% url 'dashboard' as dashboard_url %}
{% blocktrans with username=proposal.speaker.name site_name=current_site.name title=proposal.title %}
<p>{{ username }} attached you as an additional speaker to a
    talk proposal for {{ site_name }} entitled "{{ title }}".</p>

<p>For more details, visit the {{ site_name }} speaker dashboard:
    <a href="http://{{ current_site }}{{ dashboard_url }}">http://{{ current_site }}{{ dashboard_url }}</a>
</p>
{% endblocktrans %}