Notifications that have been translated using the Interface Translations feature in the Configuration module can be sent in different languages.
Only plain text notifications can be translated using the Interface Translations feature.
This action can be configured to send a notification in either a specified language or a language derived from a property value.
Language functionality for the Send Notification action is only supported in Core-based interfaces.
To send the notification in a specific language, select a language in the drop-down list. When <Primary System Language> is selected, the notification is sent as it was originally written in your system's default language. When a different language is selected, the notification is sent in the selected language if it has been translated to that language using the Interface Translations feature in the Configuration module. If the notification has not been translated to that language, the notification is sent in the system's primary language.