diff --git a/book/translation.rst b/book/translation.rst
index e2170afaaf3..04b65788c0b 100644
--- a/book/translation.rst
+++ b/book/translation.rst
@@ -425,14 +425,35 @@ via the ``request`` object::
public function indexAction(Request $request)
{
$locale = $request->getLocale();
-
- $request->setLocale('en_US');
}
+
+To store the user's locale in the session you may want to create a custom event listener and set the locale there::
-.. tip::
+ public function onKernelRequest(GetResponseEvent $event)
+ {
+ $request = $event->getRequest();
+ if (!$request->hasPreviousSession()) {
+ return;
+ }
+
+ // try to see if the locale has been set as a _locale routing parameter
+ if ($locale = $request->attributes->get('_locale')) {
+ $request->getSession()->set('_locale', $locale);
+ } else {
+ // if no explicit locale has been set on this request, use one from the session
+ $request->setLocale($request->getSession()->get('_locale', $this->defaultLocale));
+ }
+ }
+
+Read :doc:`/cookbook/session/locale_sticky_session` for more on the topic.
+
+.. note::
- Read :doc:`/cookbook/session/locale_sticky_session` to learn how to store
- the user's locale in the session.
+ Setting the locale using the ``$request->setLocale()`` method won't affect
+ rendering in the same action. The translator locale is set during the
+ ``kernel.request`` event. Either set the locale before the listener is called
+ (e.g. in a custom listener described above) or use the ``setLocale()`` method
+ of the ``translator`` service.
.. index::
single: Translations; Fallback and default locale
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