diff --git a/app/assets/stylesheets/lib/orbit_bar/orbit-bar.scss.erb b/app/assets/stylesheets/lib/orbit_bar/orbit-bar.scss.erb
index a987707..8b60f83 100644
--- a/app/assets/stylesheets/lib/orbit_bar/orbit-bar.scss.erb
+++ b/app/assets/stylesheets/lib/orbit_bar/orbit-bar.scss.erb
@@ -468,4 +468,24 @@ $orbit-bar-bgc-lighter:           lighten($orbit-bar-bgc, 20%) !default;
       }
     }
   }
-}
\ No newline at end of file
+}
+
+
+// Page doesn't exist error message
+.modal {
+  .modal-title {
+    font-weight: bold;
+  }
+  .modal-dialog {
+    width: 300px;
+    margin: 130px auto;
+  }
+
+  .modal-footer {
+    margin: 0;
+    padding: 10px 10px 10px;
+  }
+  p {
+    font-size: 16px;
+  }
+} 
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index b90d049..1a7286b 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -347,12 +347,16 @@ module ApplicationHelper
 
   	def switch_language(loc)
   		url = request.original_fullpath
-  		
   		locale = url.include?("zh_cn") ? :zh_cn : I18n.locale
-
   		url = url.gsub("/#{locale.to_s}/","/#{loc.to_s}/")
   		url = url.gsub("locale=#{locale.to_s}","locale=#{loc.to_s}") if url == request.original_fullpath
   		url = url + "#{url.include?("?") ? "&" : "?"}locale=#{loc.to_s}" if url == request.original_fullpath and (!url.include?('/'+locale.to_s) or !url.include?(locale.to_s+'='))
+  		if params["page_id"]
+  			page = Page.where(:page_id => params["page_id"]).first rescue nil
+  			if !page.nil?
+  				url = "#language_alert" if !page.enabled_for.include? loc.to_s
+  			end
+  		end
   		url
   	end
 
diff --git a/app/views/orbit_bar/index.html.erb b/app/views/orbit_bar/index.html.erb
index 9b78ec7..7a7e597 100644
--- a/app/views/orbit_bar/index.html.erb
+++ b/app/views/orbit_bar/index.html.erb
@@ -112,11 +112,11 @@
           <ul>
             <% @site_in_use_locales.each do |l| %>
               <li class="<%= (l == I18n.locale and !session['zh_cn']) ? "active" : "" %>">
-                <a href="<%= switch_language(l) %>"><%= t((l==:zh_tw ? :zh_tw_ : :_locale ), :locale => l) %></a>
+                <a href="<%= switch_language(l) %>" data-toggle="modal" ><%= t((l==:zh_tw ? :zh_tw_ : :_locale ), :locale => l) %></a>
               </li>
               <% if current_site.enable_zh_cn and l == :zh_tw and !request.path.include?("/admin/") %>
                 <li class="<%= locale==:zh_cn ? "active" : "" %>">
-                  <a href="<%= switch_language(:zh_cn) %>"><%= t(:zh_cn, :locale => :zh_tw) %></a>
+                  <a href="<%= switch_language(:zh_cn) %>" data-toggle="modal" ><%= t(:zh_cn, :locale => :zh_tw) %></a>
                 </li>
               <% end %>
             <% end %>
@@ -143,4 +143,22 @@
         <% end %>
       </ul>
     </div>
-  </div>
\ No newline at end of file
+  </div>
+  <% if params[:controller] == "pages" %>
+    <div class="modal fade" id="language_alert">
+    <div class="modal-dialog">
+      <div class="modal-content">
+        <div class="modal-header">
+          <button type="button" class="close" data-dismiss="modal"><span aria-hidden="true">&times;</span><span class="sr-only">Close</span></button>
+          <h4 class="modal-title">We are sorry.</h4>
+        </div>
+        <div class="modal-body">
+          <p>This page is not available in this language.</p>
+        </div>
+        <div class="modal-footer">
+          <button type="button" class="btn btn-primary" data-dismiss="modal">Close</button>
+        </div>
+      </div>
+    </div>
+  </div>
+  <% end %>