Minor tweak

Author: javiereguiluz

reference/configuration/framework.rst

@@ -432,7 +432,7 @@ An added bonus of defining the enabled locales is that they are automatically
 added as a requirement of the :ref:`special _locale parameter <routing-locale-parameter>`.
 For example, if you define this value as ``['ar', 'he', 'ja', 'zh']``, the
 ``_locale`` routing parameter will have an ``ar|he|ja|zh`` requirement. If some
-user makes requests with a locale not included in this option, they'll see an error.
+user makes requests with a locale not included in this option, they'll see a 404 error.
 
 set_content_language_from_locale
 ................................