Change term "membership" to "subscription" for plugin generated text

my_pmpro_gettext_membership.php

<?php
/**
 * Change term "membership" to "subscription" for plugin generated text
 */
function my_pmpro_gettext_membership( $translated_text, $text, $domain ) {
	if ( $domain == 'paid-memberships-pro' ) {
		$translated_text = str_replace( 'Membership', 'Subscription', $translated_text );
		$translated_text = str_replace( 'membership', 'Subscription', $translated_text );
	}
	return $translated_text;
}
add_filter( 'gettext', 'my_pmpro_gettext_membership', 10, 3 );