The language of a portal determines the language in which users will view content when visiting the portal on its subdomain. It also is used as the default language for any experience created within the portal.
Changing the language of a portal
If you wish to change the default language of a portal, this can be done by:
Click "Settings" under "Portal" in the main navigation
Click the "Portal" tab in the "General" group
Choose your preferred language
Click "Submit" to save this choice.