Gets a list of unsupported file types

Retrieves a list of supported languages that you can set for an individual recipient when creating an envelope, as well as their simple type enumeration values. These are the languages that you can set for the standard email format and signing view for each recipient. For example, in the recipient's email notification, this setting affects elements such as the standard introductory text describing the request to sign. It also determines the language used for buttons and tabs in both the email notification and the signing experience. **Note:** Setting a language for a recipient affects only the Docusign standard text. Any custom text that you enter for the `emailBody` and `emailSubject` of the notification is not translated, and appears exactly as you enter it. For more information, see [Set Recipient Language and Specify Custom Email Messages](https://support.docusign.com/s/document-item?bundleId=gbo1643332197980&topicId=wxf1578456494201.html).