Only fetch client side translations for the current locale

config/environments/development.rb

@@ -52,6 +52,9 @@ Rails.application.configure do
   # Suppress logger output for asset requests.
   config.assets.quiet = true
 
+  # Export translations automatically
+  config.middleware.use I18n::JS::Middleware
+
   # Raises error for missing translations
   # config.action_view.raise_on_missing_translations = true