[Book][Translation] Added tip for routing params

Author: xelaris

book/translation.rst

@@ -502,6 +502,11 @@ as the locale for the current request.
 You can now use the locale to create routes to other translated pages
 in your application.
 
+.. tip::
+
+    Read :doc:`/cookbook/routing/service_container_parameters` to learn, how to
+    avoid hardcoding the ``_locale`` requirement in all your routes.
+
 Setting a default Locale
 ~~~~~~~~~~~~~~~~~~~~~~~~