Can I change the title of the payment gateway shown during checkout?

Yes, the “Credit card / debit card” text shown during checkout can be changed with many free translation plugins, such as Say What or Loco Translate. In fact, almost any string can be changed by using the text domain woocommerce-payments. Currently, in Loco Translate, when adding a language/translation within WooPayments, the “system” location has to be selected – otherwise, the translation will not work.

Here’s how to change the “Credit card / debit card” text with Say What:

If you don’t want to use a translation plugin, you can try a simple code snippet:

function ah_change_credit_debit_text( $translation, $text, $domain ) {
	if ( $domain == 'woocommerce-payments' && $text == 'Credit card / debit card' ) {
		$translation = 'Something new!';
	}
	return $translation;
    
}
add_filter( 'gettext_woocommerce-payments', 'ah_change_credit_debit_text', 999, 3 );

The result is the same either way: