go to the file:
wp-content/plugins/paid-memberships-pro/classes/gateways/class.pmprogateway_paypalexpress.php
Find $additional_parameters
Add this line before:
$nvpStr .= "&LOCALECODE=en_US";
and there you go!
go to the file:
wp-content/plugins/paid-memberships-pro/classes/gateways/class.pmprogateway_paypalexpress.php
Find $additional_parameters
Add this line before:
$nvpStr .= "&LOCALECODE=en_US";
and there you go!