I've just acknowledged languages are a "form of encryption"...

Language can be used as a form of encryption in various ways. One way is through the use of code words or phrases, where certain words or phrases are used to represent specific information. This method is similar to a simple substitution cipher, where each letter or group of letters in the original message is replaced with another letter or group of letters.

Another way is through the use of natural language processing (NLP) techniques, where a message is disguised as normal text and encoded using complex grammar and syntax. This makes it difficult for an unauthorized person to understand the message without a key or the necessary linguistic knowledge.

A more advanced method is steganography, which is the practice of hiding a message within another message or image. For example, a message could be hidden within an image or a document by manipulating the least significant bit of the pixels, or by using frequency domain transformations.

It's important to note that these forms of encryption using language are not as secure as traditional encryption methods, such as symmetric and asymmetric encryption, which use mathematical algorithms to secure the data. Language-based encryption is often used in combination with other forms of encryption to add an extra layer of security or to conceal the fact that a message is being encrypted at all.

In summary, language can be used as a form of encryption in various ways, such as code words or phrases, natural language processing techniques and steganography. These forms of encryption are not as secure as traditional encryption methods, but they can be used to add an extra layer of security or conceal the fact that a message is being encrypted.