* Loss of Communication: Betrayal fundamentally destroys trust and communication. By denying them language, Dante might be suggesting that these souls are now incapable of meaningful communication, their words having become hollow and devoid of true meaning.
* Isolation and Loneliness: The Ninth Circle is a place of ultimate isolation. Being unable to speak would exacerbate this loneliness, leaving them truly alone with their guilt and remorse. It becomes a form of punishment in itself, as language is often a tool for connection and understanding.
* Symbolic Punishment: The act of betrayal is a violation of the very essence of human connection. Denying them language could be a symbolic punishment, reflecting the brokenness of their souls and the loss of their ability to connect with others.
* Inability to Explain: The sins of the Ninth Circle are often complex and deeply personal. They might be incapable of explaining their actions or expressing the true depths of their regret. Silence becomes a fitting consequence of their inability to fully articulate their guilt.
* Silence as a Form of Suffering: Silence, in the context of the Ninth Circle, could be a form of active suffering. Imagine being surrounded by the pain and despair of others, yet unable to speak or offer any solace. This would amplify their suffering and make their punishment all the more unbearable.
It's important to remember that Dante's *Inferno* is an allegory, and the interpretation of the Ninth Circle and its punishments is open to individual interpretation. The reasons for denying language to the inhabitants could be a combination of the above factors or something entirely different.