{% extends 'partials/base.html.twig' %}

{% block content %}
  <div id="error">
    <div>
      <h1>Error
        {{ page.header.http_response_code }}</h1>
      <p>
        {{ page.content }}
      </p>
    </div>
  </div>
{% endblock %}

{% extends 'partials/base.html.twig' %}

{% block content %}
  <div id="error">
    <div>
      <h1>{{ "ERROR"|t }}
        {{ page.header.http_response_code }}</h1>
      <p>
        {{ page.content }}
      </p>
    </div>
  </div>
{% endblock %}

Make the theme available for t9n
Make the theme available for t9n

In a way to promote i18n and coupled with a `languages.yaml` file this PR is a strating point to turn the theme translatable.
If you agree by merging this one then I will continue this process.
Thanks