searx/searx/templates/default/404.html

{% extends "default/base.html" %}
{% block content %}
<div class="center">
    <h1>{{ _('Page not found') }}</h1>
    {% autoescape false %}
    <p>{{ _('Go to %(search_page)s.', search_page='<a href="{}">{}</a>'.decode('utf-8').format(url_for('index'), _('search page'))) }}</p>
    {% endautoescape %}
</div>
{% endblock %}