Changing DONATE NOW button

I look for code to change but only changes back end, not front end on the form.
this is not a translation, I always want to have a different button for example PAY NOW

function my_give_text_switcher( $translations, $text, $domain ) {
	// changes the "Donations" text in multiple places
	if ( $domain == 'give' && $text == 'Donations' ) {
		$translations = __( 'PAY NOW', 'give' );
	}

	// changes the "Make this Donation [monthly/weekly/daily]"
	// text for a donor's choice recurring checkbox
	if ( $domain == 'give-recurring' && $translations == 'Make this donation %1$s' ) {
		$translations = __( 'PAY NOW %1$s', 'give-recurring' );
	}

	return $translations;
}
add_filter( 'gettext', 'my_give_text_switcher', 10, 3 );

can you help thanks