If I select English Interpreter because the floor audio is in French, everything works well, until the floor language changes to English, then the attendees need to move the slider to Original audio because the interpreter stops translation (either switches off his mic, or switches to the French channel to translate from English to French).
In that case I do not hear anything anymore on the English Interpreter side because WebEx does not pass-through the (now English) floor audio to the English interpreter side of the slider.
If the interpreter switches off there mic on a language channel, or moves to a different channel, the software should pass-through the floor audio on that channel because as the interpreter switches away/off from that channel it means that the original audio (floor audio) is the same as the selected language channel of the attendee.
That’s the same way normal on-site translation systems works (and Zoom). You choose a language and never have to switch. You either hear the floor audio (whenever it’s the same as the selected language channel), or you hear the interpreter.