Using enterprise login with an ArcGIS Online Subscription it is not possible to change the language at edit profile.
Last Published: February 11, 2015ArcGIS Online
Bug ID Number
January 19, 2015
June 11, 2020
Operating System Version
The issue is a duplicate of an existing issue. See the issue's Additional Information section for details. Customers associated with the duplicate issue are automatically attached to the open issue.