For a first time user a list of all possible IdPs to select from is presented.

You may select your home organization from the full list or narrow the list down first by typing a search string.

You may narrow down the selection by typing search string to search box in the upper right corner.

You need to select the IdP by clicking it. You are now directed to home organization IdP.

You may select a different language from language bar on the bottom.

If you want permanently change the language you need to edit the language options on your browser.

You may edit the IdP selection.

Discovery Service remembers the IdP you have selected. You may add another account or remove existing one.