If your job required you to learn English would you? Next time you are traveling by plane and you happen to bump into a pilot feel free to speak to him or her in English no matter what nationality they are or wherever you are in the world. All pilots and air traffic controllers must be able to speak English as English is now the new language of Aviation! If you think about it this is essential for practical reasons in an industry where simple human error could result in an accident that could kill hundreds of passengers.

Flights from different parts of the world with foreign pilots land on international airstrips around the world every day, there has to be a way for pilots and traffic controllers on the ground to communicate quickly and efficiently without confusion. Using English as a common language eradicates any communication barriers and makes it easier for air traffic controllers to instruct pilots effectively especially to warn against danger therefore saving lives.

Source: https://www.grammarly.com/blog/10-interesting-english-facts-guest/