language param bypass

<?php
$TYPO3_CONF_VARS['EXTCONF']['realurl']['_DEFAULT'] = array (
    'preVars' => array (
        array (
            'GETvar' => 'no_cache',
            'valueMap' => array (
                'no_cache' => 1
            ),
            'noMatch' => 'bypass'
        ),
        array (
            'GETvar' => 'L',
            'valueMap' => array (
                'us' => '3',
                'en' => '2',
                'fr' => '1'
            ),
            'noMatch' => 'bypass'
        )
    )
);
?>