What type of language is it when you say words backwards?

There isn't a specific language term for saying words backward. It's more of a playful or humorous way of using language, often called:

* Reverse Speech: This term is sometimes used for the practice of listening for hidden messages in recordings played backward.

* Backwards Words: A simple and straightforward descriptor.

* Word Reversal: This term is more technical and is sometimes used in linguistic studies.

It's important to note that while saying words backward might be fun, it doesn't create a new language. It's just a way of playing with the sounds of existing words.