English by radio.

An African Tribal Leader flew across the ocean to the United States to visit the president.
When he arrived at the Dulles International Airport in Washington, a host of newsmen and television cameramen met him.
One of the reporters asked the chief if he had a comfortable flight.
The chief made a series of weird noises …. “screech, scratch, honk, buzz, whistle, z-z-z-z-” … and then added in perfect English, “Yes, I had a very nice flight.”
Another reporter asked, “Chief, do you plan to visit the Washington Monument while you’re in the area?”
The chief made the same noises … “screech, scratch, honk, buzz, whistle, z-z-z-z” … and then said, “Yes, and I also plan to visit the White House and the Capitol Building.”
“Where did you learn to speak such flawless English?” asked the next reporter.
The chief replied, “Screech, scratch, honk, buzz, whistle, z-z-z-z … I spent my childhood years listening to short-wave radio broadcasts.”