> it's the english phrase. all pilots and ATC in the world are required to use english.
This is not strictly true, is it? They should be able to speak English, but they are not required to use it. https://aviation.stackexchange.com/a/14254
This is not strictly true, is it? They should be able to speak English, but they are not required to use it. https://aviation.stackexchange.com/a/14254