Change the We Accept Checkout Text for Paid Memberships Pro.

change-we-accept-checkout-text.php

<?php
/**
 * Change the "We Accept..." text on the checkout page.
 * Follow this guide to add custom code to your membership site - http://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
function change_my_pmpro_account_text( $translated_text, $text, $domain ) {

        switch ( $translated_text ) {

            case 'We Accept %s' :
                $translated_text = __( 'We accept all major credit cards', 'paid-memberships-pro' );
                break;
        }

    return $translated_text;
}
add_filter( 'gettext', 'change_my_pmpro_account_text', 20, 3 );