[SOLVED]How to set default language in babel

<?php
if($modx->context->get('key') != "mgr"){
    /* grab the current langauge from the cultureKey request var */
    switch ($_REQUEST['cultureKey']) {
        case 'en':
            /* switch the context */
            $modx->switchContext('web');
            break;
        default:
            /* Set the default context here */
            $modx->switchContext('id');
            break;
    }
    /* unset GET var to avoid
     * appending cultureKey=xy to URLs by other components */
    unset($_GET['cultureKey']);
}

# The Friendly URLs part
# detect language when requesting the root (/)
RewriteCond %{HTTP:Accept-Language} !^id [NC]
RewriteRule ^$ id/ [R=301,L]
RewriteRule ^$ en/ [R=301,L]

# redirect all requests to /en/favicon.ico and /id/favicon.ico
# to /favicon.ico
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(id|en)/favicon.ico$ favicon.ico [L,QSA]
 
# redirect all requests to /en/assets* and /id/assets* to /assets*
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(id|en)/assets(.*)$ assets$2 [L,QSA]
 
# redirect all other requests to /en/* and /id/*
# to index.php and set the cultureKey parameter
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(id|en)?/?(.*)$ index.php?cultureKey=$1&q=$2 [L,QSA]