Translation support + french.

backend/templates/base_with_header.html

@@ -13,15 +13,26 @@
                 {% else %}
                     {{ user.name }}
                 {% endif %}
-            </a> / <a href="/signout" />Sign out</a></span>
+            </a> / <a href="/signout" />{{ tr.t(Sentence::SignOut) }}</a></span>
         {% when None %}
             <span>
                 <a href="/signin" >{{ tr.t(Sentence::SignInMenu) }}</a>/<a href="/signup">{{ tr.t(Sentence::SignUpMenu) }}</a>/<a href="/ask_reset_password">{{ tr.t(Sentence::LostPassword) }}</a>
             </span>
         {% endmatch %}
 
+        <select id="select-website-language">
+        {% for lang in Tr::available_languages() %}
+            <option value="{{ lang.0 }}"
+            {%+ if tr.current_lang_code() == lang.0 %}
+                selected
+            {% endif %}
+            >{{ lang.1 }}</option>
+        {% endfor %}
+        </select>
     </div>
+
     <div class="main-container">
         {% block main_container %}{% endblock %}
     </div>
+
 {% endblock %}