How do you make a pendulum board for talking to a god or goddess, what do you add to it? and what questions would you say. Also, how would you use a pendlum to know, your god or goddess is speaking to you?
You can make a board with letters and numbers around it, an internet search will show you several examples.
You can ask most any question, although it is often easier to stick with one that can be answered in only a few words. You can also create a series of pendulum cards to assist you in asking more detailed questions.
As for using the pendulum to know if the God or Goddess is talking to you, you
have to learn how to discern if they are talking to you or not on your own.
Like I have said I have never exactly used my pendulum to communicate with deities. I have, however used pendulums alongside spirits, or letting spirits move the pendulum and help answer questions.
Nordic's advice is great.
Learning to communicate with a deity using a pendulum is much like communicating with a deity using a candle flame. You want to minimize outside influences. In the case of a pendulum learning to discern whether an outside influence like a spirit is moving the pendulum, or if it is your own movement.
A lot of discerning whether you truly are communicating with a deity or not is done with the answers you receive. It takes practice and patience, and trial and error. You will have to learn whether or not you can trust the answers you get. Whether they originate from your own subconscious, a deity, or something else.