Update Pay by Check wording in pmpro-pay-by-check to something else.

my_gettext_pay_by_check.php

<?php
/*
	Change "Pay by Check" language to "Pay by Bank"
	
	Add this code to your active theme's functions.php
	or a custom plugin.
*/
function my_gettext_pay_by_check($translated_text, $text, $domain)
{
	if($domain == "pmpro-pay-by-check" && $text == "Pay by Check")
		$translated_text = "Pay by Bank";		//change the text here
	
	return $translated_text;
}
add_filter('gettext', 'my_gettext_pay_by_check', 10, 3);