{% extends 'userena/base_userena.html' %}
{% load i18n %}

{% block title %}{% trans "Email changed!" %}{% endblock %}

{% block content_title %}<h2>{% trans 'New email' %}</h2>{% endblock %}
{% block content %}
<p>{% blocktrans %}Your new email address is saved. You can continue using userena with this email.{% endblocktrans %}</p>
{% endblock %}

{% extends 'userena/base_userena.html' %}
{% load i18n %}

{% block title %}{% trans "Email changed!" %}{% endblock %}

{% block content_title %}<h2>{% trans 'New email' %}</h2>{% endblock %}
{% block content %}
<p>{% blocktrans with site.name as site %}Your new email address is saved. You can continue using {{ site }} with this email.{% endblocktrans %}</p>
{% endblock %}

Remove userena from this template, replace it with site name
Remove userena from this template, replace it with site name