In this line of work, office software is very important. As for the Korean and English words in the emails, you can download a translation software to help you translate them. The most important thing is to place the order and contract. You must be careful and serious...check several times...the color, quantity, size...must be aligned. As for those things like trademarks... you will understand if you stay in the factory for a long time. If you don't understand, you should ask frequently and ask more...