How to get past locked password door in Level 13 of Old Nua maze?

I'm at level 13 on the Old Nua maze and there is a door that I can't pass. It requires a password that a ghost is supposed to give me but the ghost doesn't want to speak to me.
I don't want to use console cheats as recommended elsewhere.
I also don't speak Engwathian, but I heard that I'll learn it later in the game and I'm not sure if it is required here.
How can I unlock this door in a legitimate way?
EDIT: I now speak the language that the ghost does. He does give me the password but the door still wont open. BUG??
Best Answer
You have to speak the same language as the ghost. You must talk to the ghost mid east on the map and get the password. Then talk to the one south-west/central on the map to learn its been reversed. Tell the door you are there to kill his friends and you are an enemy and it will open.
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How to open the door in caed Nua?
If you ask the spirit the words to open the door he will say: "I am a servant to Od Nua. My sword arm is pledged against his enemies. My soul is sworn to his purpose."How do you open doors level 13?
To open the door you have to know password. Defeat the monsters in a ruined room (01) and in a round room (06) and talk to the spirits in these chambers. You have to say while talking to the door that you are enemy of Od Nua. Kill all enemies and ask the spirit about password to open the door (05).How do you get into Caed Nua pillars of eternity?
Once you're in Black Meadow, travel directly east to reach Caed Nua. Make your way over the bridge and then have a chat with the humming man. This guy's name is Kana, and he's another possible party member.Pillars of Eternity - Endless Paths of Od Nua Level 13 Locked Puzzle Door
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Answer 2
Apparently the ghost from the Eastern North gives you the password and a button in the middle of the room can be switched but I get no button and maybe I answered wrong with the ghost. http://guides.gamepressure.com/pillarsofeternity/guide.asp?ID=29967
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