Alright, so I need help with something. For my mod, I want to make so when the player character hits a trigger, he/she actually says something, like commenting on a cave, etc. I have a male and female voice actor and am prepared to make samples for every gender and race, and provide an option to turn off the sound, allowing the player to choose a message box so they don't have their player's voice chosen for them if that's not their fancy. Now, I know how to do ALL this except for one thing, which is actually getting the sound file to play when the player hits the trigger, and have it register as general dialogue (not in a conversation window), so that subtitles appear if enabled. I need it to actually register as a person saying something when the player hits the trigger. Any ideas on how I could make it so the player says something when they hit the trigger? Maybe make an invisible duplicate NPC of the player character at the trigger spot that says the line? Or is there a way to actually get the player to speak?

I like your invisible NPC idea, but don't duplicate the player, that is a bad idea. Just make an invisible NPC and give him a Say procedure.