That's a good point, because I think this "ability to speak multiple languages" will become commoditized too through technology. You already see pieces of technology that enable you to communicate in realtime (although clunky and not accessible enough at the moment)
I agree that "realtime" aspect would be the last wall that will stand to distinguish humans from machines, that is, until humans can find ways to inject circuits into the brain (which is already being explored by multiple entrepreneurs and scientists)
