It’s not just humans who converse. Many animals use different sounds and stances in communication, including cats.
The Wikipedia article on the subject is thorough in respect of cats “talking” to other cats and making noises while hunting, in heat, or other potentially solo activities.
It is lighter on the content on animal to human communication. This article J as more on that subject, again only about cats. Apparently cats don’t really use meows with one another, but do for humans.
I can’t help but image that they’re so fed up of us not “understanding” that they want more food and to be let out, that they’ve resorted to the cat equivalent of shouting…