It seems that voice-controlled personal assistants are all the rage these days. Microsoft and Harman Kardon just revealed the Invoke Cortana speaker, Amazon put a screen on the Echo and called it a a Show, and Google just gave the Assistant more smarts, more features, and more places to be on. But one of the inherent drawbacks of relying on voice as a medium is that no one really speaks the language in the same way. Yes, we're talking about accents, which has tripped up many personal assistants. Years after their initial debut, how far have these AI-powered agents come along? The folks over at WIRED made some rather comical tests to find out.