diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index bded1cb3..5ce9657e 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -147,6 +147,7 @@ class ApplicationController < ActionController::Base
     session[:locale] = params[:locale] if params[:locale]
     browser_locale = condition = nil
     default_locale = condition = nil
+    backup_locale = condition = nil
 
     # check if locale is valid for non site pages
     if LIST[:forbidden_item_names].include?(env['PATH_INFO'].split('/')[1].to_s)
@@ -161,9 +162,11 @@ class ApplicationController < ActionController::Base
       #check enable langauge detection
       browser_locale = request.env['HTTP_ACCEPT_LANGUAGE'].scan(/^[a-z]{2}/).first rescue nil
       condition = @site.in_use_locales.include?(browser_locale)
+    elsif (@site.default_locale.nil? && @site.enable_language_detection.eql?(false))
+      condition = @site.valid_locales.first
     end
 
-    session[:locale] = condition ? (browser_locale || session[:locale] || default_locale) : I18n.default_locale.to_s
+    session[:locale] = condition ? (browser_locale || session[:locale] || default_locale || backup_locale) : I18n.default_locale.to_s
     I18n.locale = session[:locale].to_sym
     @site_in_use_locales = @site.in_use_locales
     @site_valid_locales = site_locales_default_head(@site.valid_locales)
diff --git a/app/views/admin/items/_site_bar.html.erb b/app/views/admin/items/_site_bar.html.erb
index 85f71f59..cc4525a7 100644
--- a/app/views/admin/items/_site_bar.html.erb
+++ b/app/views/admin/items/_site_bar.html.erb
@@ -14,7 +14,7 @@
 
 				<li title="Site Info"><%= link_to admin_site_site_info_path(@site), :class => active_for_action('sites', 'site_info') do %><span><i class="icons-browser"></i></span><%end%></li>
 
-				<li title="Site Mobile"><%= link_to admin_site_responsive_setting_path(@site), :class => active_for_action('sites', 'responsive_setting') do %><span><i class="icons-mobile"></i></span><%end%></li>
+				<li title="Mobile Setting"><%= link_to admin_site_responsive_setting_path(@site), :class => active_for_action('sites', 'responsive_setting') do %><span><i class="icons-mobile"></i></span><%end%></li>
 
 				<li title="Search Engine"><%= link_to admin_site_search_engine_path(@site), :class => active_for_action('sites', 'search_engine') do %><span><i class="icons-search"></i></span><%end%></li>
 
diff --git a/app/views/admin/sites/_side_bar.html.erb b/app/views/admin/sites/_side_bar.html.erb
index 85f71f59..cc4525a7 100644
--- a/app/views/admin/sites/_side_bar.html.erb
+++ b/app/views/admin/sites/_side_bar.html.erb
@@ -14,7 +14,7 @@
 
 				<li title="Site Info"><%= link_to admin_site_site_info_path(@site), :class => active_for_action('sites', 'site_info') do %><span><i class="icons-browser"></i></span><%end%></li>
 
-				<li title="Site Mobile"><%= link_to admin_site_responsive_setting_path(@site), :class => active_for_action('sites', 'responsive_setting') do %><span><i class="icons-mobile"></i></span><%end%></li>
+				<li title="Mobile Setting"><%= link_to admin_site_responsive_setting_path(@site), :class => active_for_action('sites', 'responsive_setting') do %><span><i class="icons-mobile"></i></span><%end%></li>
 
 				<li title="Search Engine"><%= link_to admin_site_search_engine_path(@site), :class => active_for_action('sites', 'search_engine') do %><span><i class="icons-search"></i></span><%end%></li>