mypmpro-change-expires-to-renew-account-page.php

<?php //do not copy

/**
 * This recipe changes the 'Expires' text on the Membership Account page to 'Renewal Date'
 *
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */

function my_pmpro_expiration_date( $translated_text, $text, $domain ) {

    //check the text domain
    if( $domain == 'paid-memberships-pro' ) {
        if( $text == 'Expires' ) {
            return 'Renewal Date';
        }
    }
    
    return $translated_text;

}
add_filter( 'gettext', 'my_pmpro_expiration_date', 20, 3 );