Fix Woocommerce Translation Checkout Process

gistfile1.txt

add_filter('locale', 'localize_backend');

function localize_backend( $locale ) {
    // set langauge if user is in admin area
    if( defined( 'WP_ADMIN' ) || ( isset( $_REQUEST['pwd'] ) && isset( $_REQUEST['kau-boys_backend_localization_language'] ) ) ){
        // ajax call from frontend
        if ( 'admin-ajax.php' == basename( $_SERVER[ 'SCRIPT_FILENAME' ] ) && strpos( admin_url(), $_SERVER[ 'HTTP_REFERER' ] ) === false ) {

            // if lang request param was set, change locale for AJAX response, else, don't overwrite locale (use frontend locale)
            if ( isset($_COOKIE['lang'] ) ) {
                $locale = $_COOKIE['lang'];
            }
        }
    }

    return $locale;
}