Flip on locale setting

app/controllers/application_controller.rb

@@ -3,6 +3,17 @@ class ApplicationController < ActionController::Base
   # For APIs, you may want to use :null_session instead.
   protect_from_forgery with: :exception
   before_filter :configure_permitted_parameters, if: :devise_controller?
+  before_action :set_locale
+
+  def default_url_options(options={})
+    {locale: I18n.locale}
+  end
+
+  private
+
+  def set_locale
+    I18n.locale = params[:locale] || I18n.default_locale
+  end
 
   protected
 

app/views/layouts/_nav.html.erb

@@ -24,7 +24,11 @@
     <% end %>
 
     <li>
-      <a href="#">English</a>
+      <% if I18n.locale != :en %>
+        <%= link_to 'English', root_url(locale: 'en') %>
+      <% elsif I18n.locale != :bg %>
+        <%= link_to 'Български', root_url(locale: 'bg') %>
+      <% end %>
     </li>
   </ul>
 </nav>