There are several qualities to become an educated /cultured person. I, however, believe that there are at least two characthers a culthered person should have.
First, an educated person should speak at least one language other than their own.
In this time, If we speak only laguage, It isn't enough. You nessecery to speak at least two languages. And now Thailand joins ASEAN. If we know more than one language, we'll have advantage-over for study or find a job.
Second, an educated person has the ability to speak clearly.
In daily, we meet many people. Comunication is important to contact with other. We should think about listener. For example, knowledge, and experience for make them understanding. A good communication will bring a good change to you. But you'll miss the turning point in your life when you can't communicate with other.
The 2 characteristics above to be those that are necessary in order to be a well cultured person. In turn, being an cultured person is an essential prerequisite for living your best life.