_includes/menubar.html

{% assign menus = site.data.[page.menubar] %}

<aside class="menu">
    {% for menu in menus %}
    <p class="menu-label">{{ site.data.translate[menu.name] }}</p>
    <ul class="menu-list">
        {% for item in menu.items %}
        <li>
            <a href="{{ item.link | prepend: site.baseurl }}"
                class="{% if item.link == page.url %}is-active{% endif %}">
                {{ site.data.translate[item.name] }}
            </a>
        </li>
        {% endfor %}
    </ul>
    {% endfor %}
</aside>