Add support for multilingual page

_layouts/page.html

@@ -1,6 +1,13 @@
 {% include header.html %}
         <div class="medium-12 columns content-box">
             <div class="whitebox">
+              <div class="lang-list">
+                {% assign translations = site.pages | where: "ref", page.ref | sort: 'lang' %}
+                {% for node in translations %}
+                  <a href="{{ node.url }}">{{ site.langs[node.lang] | escape }}</a>
+                {% endfor %}
+              </div>
+
               {{ content }}
             </div>
         </div>