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McDonalds removes AI drive-throughs after order errors
(www.bbc.com)
This is a most excellent place for technology news and articles.
Idk, you could probably just show the grammar on the screen, and also allow manual entry (if insider) or fallback to a human.
That way you'd get errors (sorry, I didn't understand that) instead of wrong orders with a pretty high degree of confidence. As long as there's a fallback, it should be fine.
Anyway, that's my take. I'm probably wrong though since I don't deal with retail customers.