Change "Register" to "Sign Up" in Memberlite WordPress theme.

change-register-memberlite-theme.php

<?php
/**
 * Change 'Register' wording in Memberlite theme to 'Sign Up'
 * Add this code to your site by following this guide - https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
 function my_change_memberlite_wording( $translated_text, $text, $domain ) {
  switch( $translated_text ) {
    case 'Register':
      $translated_text = __( 'Sign Up', 'memberlite' );
      break;
   case 'Log In':
     $translated_text = __( 'Sign Up', 'paid-memberships-pro' );
     break;
  }
  return $translated_text;
 }
 add_filter( 'gettext', 'my_change_memberlite_wording', 20, 3 );