Woocomm change backorder text

function so_42345940_backorder_message( $text, $product ){
    if ( $product->managing_stock() && $product->is_on_backorder( 1 ) ) {
        $text = __( 'Avaliable on Pre-Order', 'your-textdomain' );
    }
    return $text;
}
add_filter( 'woocommerce_get_availability_text', 'so_42345940_backorder_message', 10, 2 );