change add to cart text for specific product woocommerce

add_filter( 'woocommerce_product_add_to_cart_text', 'custom_loop_add_to_cart_button', 20, 2 ); 
function custom_loop_add_to_cart_button( $button_text, $product ) {
    // HERE define your specific product IDs in this array
    $specific_ids = array(37, 40, 53);

    if( in_array($product->get_id(), $specific_ids) ) {
        $button_text = __("add to cart", "woocommerce");
    } else {
        $button_text = __('+', 'woocommerce');
    }
    return $button_text;
}