How do you formalize in Korean?

Answer 1

There's a few ways to do this, depending on who you are speaking with.

Adding 'yo' to the end of your sentence basically makes it more formal, however it doesn't work with every sentence ending.

Adding 'eum/im/am ni da' to the end of a sentence, for use in very formal conversations. This is only really used in cases such as speaking to an elder, or important person such as a high ranking businessman.

This is also used in fixed expressions ie; 'Johnimnida' (my name is John) or 'kamsahamnida (thank you)