Is there anywhere in the English-speaking world where a voice crack is called differently?
In general, the various flavors of English that you showed are extremely close to each other, especially when looking at the standard/official language from each country (which is implied when you say American English or Australian English). There is much more variation in more localized versions of the language, such as Cockney.
In general, the various flavors of English that you showed are extremely close to each other, especially when looking at the standard/official language from each country (which is implied when you say American English or Australian English). There is much more variation in more localized versions of the language, such as Cockney.