diff --git a/AKPlan/templates/AKPlan/plan_akslot.html b/AKPlan/templates/AKPlan/plan_akslot.html
index e519491fe66bbe91064be9ffca4a5b878ecfb2bb..fe86ad273b3b0a070ce5c09531f6eade3b83c921 100644
--- a/AKPlan/templates/AKPlan/plan_akslot.html
+++ b/AKPlan/templates/AKPlan/plan_akslot.html
@@ -7,7 +7,10 @@
 <link href='{% static 'AKPlan/vendor/fullcalendar-scheduler/main.css' %}' rel='stylesheet'/>
 
 {% with 'AKPlan/vendor/fullcalendar-scheduler/locales/'|add:LANGUAGE_CODE|add:'.js' as locale_file %}
-    <script src="{% static locale_file %}"></script>
+    {% if LANGUAGE_CODE != "en" %}
+        {# Locale 'en' is included in main.js and does not exist separately #}
+        <script src="{% static locale_file %}"></script>
+    {% endif %}
 {% endwith %}
 
 <script>
diff --git a/AKPlan/templates/AKPlan/plan_base.html b/AKPlan/templates/AKPlan/plan_base.html
index 50cb2c07baab49eb7bef6dbb945ba1a5b1519504..320e3f838652ee7a6aecf115d57024e305eb0470 100644
--- a/AKPlan/templates/AKPlan/plan_base.html
+++ b/AKPlan/templates/AKPlan/plan_base.html
@@ -16,7 +16,10 @@
     <link href='{% static 'AKPlan/vendor/fullcalendar-scheduler/main.css' %}' rel='stylesheet'/>
 
     {% with 'AKPlan/vendor/fullcalendar-scheduler/locales/'|add:LANGUAGE_CODE|add:'.js' as locale_file %}
-        <script src="{% static locale_file %}"></script>
+        {% if LANGUAGE_CODE != "en" %}
+            {# Locale 'en' is included in main.js and does not exist separately #}
+            <script src="{% static locale_file %}"></script>
+        {% endif %}
     {% endwith %}
 
     {% block fullcalendar %}{% endblock %}
diff --git a/AKPlan/templates/AKPlan/plan_wall.html b/AKPlan/templates/AKPlan/plan_wall.html
index a04e1e9107aba7fe75494232a29e2fa8f9bfe446..c824955884bc58b7d8d79d455b95519158a22e5a 100644
--- a/AKPlan/templates/AKPlan/plan_wall.html
+++ b/AKPlan/templates/AKPlan/plan_wall.html
@@ -25,7 +25,10 @@
     <link href='{% static 'AKPlan/vendor/fullcalendar-scheduler/main.css' %}' rel='stylesheet'/>
 
     {% with 'AKPlan/vendor/fullcalendar-scheduler/locales/'|add:LANGUAGE_CODE|add:'.js' as locale_file %}
-        <script src="{% static locale_file %}"></script>
+        {% if LANGUAGE_CODE != "en" %}
+            {# Locale 'en' is included in main.js and does not exist separately #}
+            <script src="{% static locale_file %}"></script>
+        {% endif %}
     {% endwith %}
 
     <script>
diff --git a/AKScheduling/templates/admin/AKScheduling/scheduling.html b/AKScheduling/templates/admin/AKScheduling/scheduling.html
index 6d5eb9857856d0833f3d7ca3435b7d46a73faa0d..79480ee6f0e17e9e292a63830039a9502dd5f84b 100644
--- a/AKScheduling/templates/admin/AKScheduling/scheduling.html
+++ b/AKScheduling/templates/admin/AKScheduling/scheduling.html
@@ -17,7 +17,10 @@
     <link href='{% static 'AKPlan/vendor/fullcalendar-scheduler/main.css' %}' rel='stylesheet'/>
 
     {% with 'AKPlan/vendor/fullcalendar-scheduler/locales/'|add:LANGUAGE_CODE|add:'.js' as locale_file %}
-        <script src="{% static locale_file %}"></script>
+        {% if LANGUAGE_CODE != "en" %}
+            {# Locale 'en' is included in main.js and does not exist separately #}
+            <script src="{% static locale_file %}"></script>
+        {% endif %}
     {% endwith %}
 
     <style>