diff --git a/config/routes.rb b/config/routes.rb
index 15ee4150..5e172cda 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -57,7 +57,7 @@ Rails.application.routes.draw do
 
     # Gestionar artículos según idioma
     nested do
-      scope '(:locale)' do
+      scope '/(:locale)', constraint: /[a-z]{2}/ do
         post :'posts/reorder', to: 'posts#reorder'
         resources :posts do
           get 'p/:page', action: :index, on: :collection