Locale parameter

The locale parameter:

  • Localizes the payment page with the customer’s language, region, and available payment methods
  • Sends email templates in the customer’s preferred language
  • Specifies any special preferences for the user interface.

Note: If an email template is set for a German customer, but the locale parameter is en_US, the English email template is sent instead of the German one.

You can also use locale to show variants of specific payment methods, e.g.:


Use the format ab_CD with:


If locale parameters are left empty or contain a unsupported value, the default is American English en_US.


Propose a change on GitHubexternal-link-icon or
send an email to [email protected]

Other languages

For an explanation in another language, contact your account manager.