For those that don't want to watch the video, the answer is "press the correct spot on the far corner of a touch screen exactly the right number of times, or look at it to see what color it has turned". This is a function that occasionally needs to be done in an urgent situation, potentially also one where the "autopilot" has given up (low visibility).
I guess you're either the one person on earth who speaks with perfect articulation at all times, or you've never been forced to use a voice interface in an emergency with a screaming child right behind you.
Let’s assume you are not trolling (lol) and give an answer. I think they use Nuance, so the accent handling and language support should be pretty good and improving steadily with time. But yes at any given time it will be possible for a troll to find some human language somewhere on earth that is not supported, no doubt. Imagined problems.
For those that don't want to watch the video, the answer is "press the correct spot on the far corner of a touch screen exactly the right number of times, or look at it to see what color it has turned". This is a function that occasionally needs to be done in an urgent situation, potentially also one where the "autopilot" has given up (low visibility).