When using Swedish Bank Id Signicat Signin portal, you can’t affect used language with ui_locales query parameters. UI is always fixed to browsers language setting.
We have a case where we can start our own application with different language than browser language, but we can’t affect Signicat Bank ID signing portal to use same language as our own application.
Hi Kimmo,
Thank you for your questions. We have previously responded to you via our support system about this, but want to share some of the information here as well to make it visible for the rest of our community members.
When using ui_locales query parameters it is important that the language you are trying to add is enabled for the specific service. In this case it was not enabled, and therefor it did not work.
This was resolved by enabling the specific language, then the ui_locales worked as expected.