Change "Place order" button text on WooCommerce Checkout page (ok)

https://rudrastyh.com/woocommerce/place-order-button-text.html

Hoặc đơn giản hơn

function filter_woocommerce_order_button_html($button) { 
  $order_button_text = apply_filters( 'woocommerce_order_button_text', __( "Place order s", "woocommerce" ) );
  return '<button type="submit" class="button alt" name="woocommerce_checkout_place_order" id="place_order" value="' . esc_attr( $order_button_text ) . '" data-value="' . esc_attr( $order_button_text ) . '">' . esc_html( $order_button_text ) . '</button>';
}; 
add_filter( 'woocommerce_order_button_html', 'filter_woocommerce_order_button_html', 10, 1 );