efalut language is Japanese {% endcomment %}
          {% if page.lang != "ja" %}
            {% assign lang_prefix = "/" | append: page.lang | append: "/" %}
          {% endif %}
          <li><a class="white-text" target="_blank" href="https://github.com/malaybaku/VMagicMirror">Source Code(GitHub)</a></li>
          <li><a class="white-text" href="{{ lang_prefix | default: "/" | relative_url }}changelog">Change Log</a></li>
          <li><a class="white-text" href="{{ lang_prefix | default: "/" | relativ