Communication takes place on several levels.
In spiritual terms, there are urgings of the spirit, there is discernment as you say, that do not rise to the level of language as such. In your prayer life, certainly there are words spoken and another level of communication and meaning that bypass the spoken word.
In some cases these don't even rise to the level of conscious thought, which is why prayer must be accompanied by meditation, or why it takes time for an answer to percolate to the surface sometimes. Language represents thought and helps to codify it but it rests on a foundation that is not easily accessible to language.
Or so it seems to me.
Finding words for things which have no words is a challenge and a gift.