Fix calendar language in two views

This resolves #143

AKPlan/templates/AKPlan/plan_akslot.html

@@ -6,6 +6,7 @@
 {% include "AKPlan/load_fullcalendar.html" %}
 
 <script>
+    {% get_current_language as LANGUAGE_CODE %}
 
     document.addEventListener('DOMContentLoaded', function () {
         var calendarEl = document.getElementById('akSlotCalendar');

AKPlan/templates/AKPlan/plan_wall.html

@@ -22,6 +22,8 @@
 
     {% include "AKPlan/load_fullcalendar.html" %}
 
+    {% get_current_language as LANGUAGE_CODE %}
+
     <script>
         document.addEventListener('DOMContentLoaded', function () {
             var planEl = document.getElementById('planCalendar');