Is there an expression for something can not be spoken because it is decipherable?

There isn't a single perfect expression for something that can't be spoken because it's decipherable, as the concept is a bit paradoxical. Here's why and some potential options depending on the specific nuance you want to convey:

The Paradox:

* Decipherable implies understanding: If something is decipherable, it means it can potentially be understood, and therefore communicated.

* Spoken implies verbalization: If something can't be spoken, it implies it's not being verbalized.

Possible Solutions:

1. Focus on the inability to express:

* Unspeakable: This is a common term for something too profound or horrifying to be put into words.

* Ineffable: Similar to "unspeakable," suggesting something beyond description.

* Unutterable: Emphasizes the impossibility of voicing the concept.

2. Highlight the difficulty of understanding:

* Beyond comprehension: This emphasizes the limitations of human understanding.

* Indecipherable: This directly contradicts the idea of being decipherable, highlighting the complexity or ambiguity.

* Unfathomable: This emphasizes the depth and mystery of the concept.

3. Use metaphors and imagery:

* The silence speaks volumes: This conveys the idea that the unsaid can be powerful.

* A hidden truth: This implies a secret or knowledge that is not easily revealed.

* The language of the soul: This suggests a form of communication beyond words.

Ultimately, the best expression will depend on the context and the specific meaning you want to convey.

For example, if you're talking about a secret code, "indecipherable" might be the most appropriate. If you're describing a feeling that's too intense to put into words, "unspeakable" might be better.