What Language behavior when SSO is activated

Summary:

What langauge behavior when SSO is activated for user with prefered language? How about for administrator logins?

Content (required):

When logging in with SSO activated, is prefered language setting of user always used? Are there instances where language setting from login/ choose page is used.

If administrator login, what is the language behavior?

Version (include the version you are using, if applicable):

23A (11.13.23.01.0)

Code Snippet (add any code snippets that support your topic, if applicable):

N/A