Is there a way to select desired language in the Office 365 user creation wizard?
Or can user's language setting be taken from the corresponding account language properties?
This setting affects the
PreferredLanguage property value of user on the Microsoft Partner Center side.
Feature Request #PFR-1348: "Office 365: User's language should be taken from account's upon user creation" has been addressed to Odin Development team to implement such functionality.
Contact firstname.lastname@example.org or TAM to trace the status of the request.
Workaround: created a Service User first and then assign Office 365 service to him.