You can understand it this way, that is, each creature has its own number, and the numbers of all creatures are different. This means that although the name is the same as "Hobgoblin Warrior", that It's just a title, each hobgoblin warrior is a different individual. "True name" is such a thing. When you know the "true name" of a creature and release a spell, the target of this spell will only be the creature corresponding to the "true name" you mentioned. This spell is " True Name Spell”.

As for interaction, I remember that DND has a special "true name" spell list in this expansion. The spells in it all need to know the "true name" of a certain target before they can be released. Pure Apple Orchard ( There should be a DND forum), you can search for "real name" in the forum.

Well, I can only help you so much. . .