Language indicator (ISO 639) to specify the language that should be presented to the customer (e.g. for error messages, frontend display).
If the language is not transferred, the browser language will be used. For a non-supported language English will be used.
Payment specific reference:
Page: SA - 3-D Secure verification (3dscheck)
Page: SA - Account verification (bankaccountcheck)
Page: SA - Creating a contract (createaccess)
Page: SA - Customer management (updateuser)
Page: SA - Initiating a payment process in the billing module (vauthorization)
Page: SA - Create a mandate (managemandate)
Page: SA - Initiating payment process (authorization)
Page: SA - Verifying credit cards (creditcardcheck)
Page: SA - Address verification (addresscheck)
Page: SA - Initiating payment reservation (preauthorization)