Index: admingui/core/src/main/resources/templates/iframe.layout
===================================================================
--- admingui/core/src/main/resources/templates/iframe.layout	(revision 51847)
+++ admingui/core/src/main/resources/templates/iframe.layout	(working copy)
@@ -44,7 +44,7 @@
     getPluginIdFromViewId(viewId="#{facesContext.viewRoot.viewId}", pluginId="#{pluginId}");
 </ui:event>
 <sun:page>
-    <sun:html>
+    <sun:html lang="#{view.locale.getLanguage()}">
 	<ui:event type="beforeCreate">
 	    setPartialRequest("false");
 	</ui:event>
Index: admingui/core/src/main/resources/templates/baseLayout.xhtml
===================================================================
--- admingui/core/src/main/resources/templates/baseLayout.xhtml	(revision 51847)
+++ admingui/core/src/main/resources/templates/baseLayout.xhtml	(working copy)
@@ -46,7 +46,7 @@
 </ui:event>
 
 <sun:page>
-    <sun:html>
+    <sun:html lang="#{view.locale.getLanguage()}">
         <ui:event type="beforeCreate">
             setPartialRequest("false");
             initSessionAttributes();