Knowledge: Korean is the most used language in South Korea. On the other hand, English is the main communication in New York City.

Conversation:
My favorite city is New York.
That's interesting! Did you know the phrase "New York minute" came about because of the city's reputation for fast pace?
Oh, so that's why they say that. What is the population of New York City?
The city has 8.5 million people if you can believe it! About 40% of the state's population lives there! What else would you like to know?
That's a lot of people! How about the diversity, is it a diverse city?
New York City is actually the premier gateway into the US for legal immigration. Because of that over 800 languages can be heard throughout the city!
That's insane. Do you know what language is mostly used?

Response: Absolutely! The most used language in New York City is English.