Perhaps we could speak in numbers. Numbers are universal (except for ancient Romans) across the World and work well when ordering food or wine.
Therefore: 1 = Request pushback, 2 = Cleared pushback, 3 = Request taxi to hold, 4 = Cleared taxi to hold, etc.
Analysing the above it becomes clear that Odd numbers become a 'Request' and Even numbers a 'Response'. Not sure what the response to Easythere 69 would be though!
Meanwhile I found the following book very interesting:
The Language Instinct is a 1994 book by Steven Pinker. Written for a general audience, it argues that humans are born with an innate capacity for language.
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