| Name | Type | Description | Notes |
|---|---|---|---|
| language | string | The registrant's language preference for confirmation emails: * `en-US` — English (US) * `de-DE` — German (Germany) * `es-ES` — Spanish (Spain) * `fr-FR` — French (France) * `jp-JP` — Japanese * `pt-PT` — Portuguese (Portugal) * `ru-RU` — Russian * `zh-CN` — Chinese (PRC) * `zh-TW` — Chinese (Taiwan) * `ko-KO` — Korean * `it-IT` — Italian (Italy) * `vi-VN` — Vietnamese * `pl-PL` — Polish * `Tr-TR` — Turkish | [optional] |