First of all probably there is different in languages, for instance if compare Korean and English. There are number of ways how one can address the message to the col league in Korea, depending on the position, whether he/she is elder, one decides whether to talk in polite or impolite form (not officially); in USA there is just intonation and the language person uses, casual or formal.

Culture of the country, probably the most important factor that influences the companies to change their corporate cultures to fit the country. Again, in Korea it is essential that a person in a lower position has to bow, while the one in a higher position can just shake the head or wave a hand. In modern western countries the hand shake is widely adopted to the corporate culture. While in Korea when shaking hands, it is almost essential that one must make a handshake with both hands to show the respect, while in western countries the firm handshake and the eye contact is a better expression of respect.

There is also overtime in USA that is paid 1.5 times the hourly wage (depends on a state). On the contrary in Korea, the overtime in most companies is 2-4 hours a day, moreover it is not even paid. It is very hard to understand, but the productivity of an 8 hour work day is much higher than the 10-12 hour work day in Korea. Many scientists say the reason for it is the attitude of the person, and the way that on is treated by the authority of the company.