{% load i18n %}
<div class="overflow">
<table class="listing">
    <col />
    <col />
    <col />
    <thead>
        <tr>
            <th>{% trans "Submission Date" %}</th>
            {% for heading in data_headings %}
                <th>{{ heading }}</th>
            {% endfor %}
            <th>{% trans "Delete Submission" %}</th>
        </tr>
    </thead>
    <tbody>
        {% for row in data_rows %}
            <tr>
                {% for cell in row.fields %}
                    <td>
                        {{ cell }}
                    </td>
                {% endfor %}
                <td>
                <a class="button button-small button-secondary" href="
                    {% url 'wagtailforms:delete_submission' form_page.id row.model_id %}">
                    delete</a>
                </td>
            </tr>
        {% endfor %}
    </tbody>
</table>
</div>

{% load i18n %}
<div class="overflow">
<table class="listing">
    <col />
    <col />
    <col />
    <thead>
        <tr>
            <th>{% trans "Submission Date" %}</th>
            {% for heading in data_headings %}
                <th>{{ heading }}</th>
            {% endfor %}
            <th>{% trans "Actions" %}</th>
        </tr>
    </thead>
    <tbody>
        {% for row in data_rows %}
            <tr>
                {% for cell in row.fields %}
                    <td>
                        {{ cell }}
                    </td>
                {% endfor %}
                <td>
                <a class="button button-small button-secondary" href="
                    {% url 'wagtailforms:delete_submission' form_page.id row.model_id %}">
                    delete</a>
                </td>
            </tr>
        {% endfor %}
    </tbody>
</table>
</div>

Change column name (Delete Submission to Actions)
Change column name (Delete Submission to Actions)
