Why all cats do not they speak?

I'm a big reader of Philippe Ragueneau, both in his book "esoteric", that all these cat stories. I have all these books. This is an author who speaks our language, we who love cats, pamper, he said himself, simply sit and observe, there would be so many anecdotes to write. But we're not a writer, so that Monsieur Ragueneau, continues to charm us with the antics and pranks of his cats (which look like two drops of water to ours). That is, after close this book, we must all regret that our cats do not really speak. Of course, there are the meowing that we interpret, but we're about to do correctement.Car love their eyes says it all, and confidence leads us, are we worthy !!!!!