1. The checkout page displays in Norwegian. My paypal is registred in Norwegian, but changed language to English, but it's still Norwegian? (until the user logs in).
Seems I solved it by forcing the PayPal to run in English by following this thread, and just replacing DE with GB.
2. "The link you have used to enter the PayPal system is invalid", I'm having a subscription and this is the error people get after the log in. How can I troubleshoot this?
Solved this after all -heh. I forgot to email confirm my PayPal account
My PayPal mail is in the settings, and IPN is turned on.