this would be difficult for any nationalities whose population has a physical tendency not to form words all that clearly... us Australians for example - classics at speaking without moving the jaw and lips much at all. Half of us could be mistaken for ventriloquists. And I can't imagine how they'd be able to adapt this technology to Asian folks who typically use very different physical movements to pronounce some english words/letters... case in point: they seem to have issues with pronouncing words containing the letters L and R from what I've heard.

The shortest distance between two points is no distance at all...

Perfect excuse for an Arachnid Whacking Day if ever I heard one.