You can use the Administration Portal to set the default language preference for new users.
The default language preference for new users is controlled by the system default language. If necessary, an administrator can select a different preferred language for a user when manually creating or modifying the user in the Administration Portal. Users also can choose their own preferred language from the user profile menu in Content Innovation Cloud applications.
Note: Changing the system default language does not change the language in
which system data and configured items are stored. Language settings apply to system
emails, notifications, and the names of UI components.
To change the system default language: