Ich möchte einige Routen von FOSUserBundle überschreiben

MyBundle/Resources/config/routing/security.yml

fos_user_security_login:
    path:     /{_locale}/login
    defaults: { _controller: FOSUserBundle:Security:login }
    requirements:
        _locale: %locales%

fos_user_security_check:
    path:     /login_check
    defaults: { _controller: FOSUserBundle:Security:check }
    requirements:
        _locale: %locales%

fos_user_security_logout:
    path:     /{_locale}/logout
    defaults: { _controller: FOSUserBundle:Security:logout }
    requirements:
        _locale: %locales%

Aber es funktioniert nicht, Route nicht gefunden

MyBundle/Resources/config/routing/security.xml

<?xml version="1.0" encoding="UTF-8" ?>

<routes xmlns="http://symfony.com/schema/routing"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://symfony.com/schema/routing http://symfony.com/schema/routing/routing-1.0.xsd">

    <route id="fos_user_security_login" pattern="/{_locale}/login">
        <default key="_controller">FOSUserBundle:Security:login</default>
    </route>

    <route id="fos_user_security_check" pattern="/login_check">
        <default key="_controller">FOSUserBundle:Security:check</default>
        <requirement key="_method">POST</requirement>
    </route>

    <route id="fos_user_security_logout" pattern="/{_locale}/logout">
        <default key="_controller">FOSUserBundle:Security:logout</default>
    </route>

</routes>

Das funktioniert, aber ich weiß nicht, wie ich meinen locales-Parameter von parameter.yml übergeben soll