Must pilots know how to speak English?
For the most part, English is a primary language spoken by pilots, but there are certain occasions where the language shifts based on the airline—for example, pilots who work for Spanish airlines often speak Spanish on the radio, and some Canadian airlines use French.
How are medical emergencies handled on an airplane?
Planes are usually prepared to take on any medical problem that occurs onboard. Crew members receive medical training that ensures their ability to take control in the event of an emergency. Besides, there's always the chance that a nurse or doctor is onboard.