Owen, are you saying that pilots in other countries are not required to
learn English to get their license?

Depends what you mean by 'other countries.' Many countries predominantly do
not
speak English and naturally English is not required to fly airplanes in many
countries. In the USA, FAA does require US certificated pilots know English,
and pilots from other places should be able to speak the dominant language in
USA, English. English is theoretically spoken by ATC around the world in ICAO
compliant nations.

Thank you Rolf and Owen.
I learned something today.
I had always (incorrectly) believed that English proficiency was
required by all countries to acquire a pilot's license.