How they address the king

The king is jeonha, the queen jungjeon-mama, the crown prince jeoha. 'Mama' attaches to royal women and the crown prince; a high official is daegam, below him yeonggam or nari. A subject lowers himself to soin while the king calls himself gwain. Subtitles usually flatten all of this into a name or 'Your Majesty', so knowing the words lets you see one more layer of rank.