First, Korean and American greeting are different.
Koreans have two greeting method.
One is that a person bows the back.
Second is that they shake hands.
The second style of greeting, shaking hands, is the same in America.
Second, come here sign use the time when I want to come to me a person who i call in Korea.
But, this sign is an insult in Australia.
Third, the v sign means something different in Korean and British is different.
The v is a pose for a picture in Korea.
But, the v sign is an insult in England.
Finally, a okay sign means a okay and great in America and Korea.
But, Korean has one more meaning.That is money.