For information purposes we specify a relay language for each event.
If you are an account owner/administrator you can open the list of your events, find your event, and go to the “languages” column and click a triangle for that event. The relay language on the list will be highlighted.
If you an interpreter you can see the relay language in the left information “Details” screen in the interpreter console.
Note: events with only 2 languages do not require a relay language.