D&C 9

Though Oliver Cowdery was promised the ability to translate, he is lovingly taught how this works - 

"Behold, you have not understood; you have supposed that I would give it unto you, when you took no thought save it was to ask me.

8 But, behold, I say unto you, that you must study it out in your mind; then you must ask me if it be right, and if it is right I will cause that your bosom shall burn within you; therefore, you shall feel that it is right.

9 But if it be not right you shall have no such feelings, but you shall have a stupor of thought that shall cause you to forget the thing which is wrong; therefore, you cannot write that which is sacred save it be given you from me."  (Doctrine and Covenants 9:7–9)

In my mind, though one could relate this to all types of revelation, the Lord specifically speaks of translation and scriptures saying "you cannot write that which is sacred".