We are using the
Cartthrob_paypal_express.php Payment Gateway with CartThrob for over a year now and it is working great.
Just yesterday I noticed that users are being taken to the English version of PayPal when clicking "Purchase". In the top right there is a language dropdown select with English, French and Spanish I believe but not German.
Logging in an purchasing works nonetheless but I would like to have the users land on the German language version since we are a German shop.
I called PayPal today but all they could tell me was that it must have something to do with the payment gateway plugin. I skimmed through the php file but couldn't find anything really (not good with php).
In the CT prefs I also coudn't find anything. Also the API username and stuff doesn't give me a clue.
Thanks and Cheers!