This is something that you can setup in your Paypal account, also if you are using a translation file in WP the shopping cart will pass this value to Paypal but I not sure if they are compatible, the best option is to set you language in Paypal.
Xpark Media
This is something that you can setup in your Paypal account, also if you are using a translation file in WP the shopping cart will pass this value to Paypal but I not sure if they are compatible, the best option is to set you language in Paypal.