Many cat owners would like to think so and some even claim that their cats speak a number of recognisable words. A Brazilian cat takes claims one step further by apparently being able to sing a number of well known songs while the Fortean Times carried a report of a cat which speaks several words in Turkish and suggested, with tongue firmly in cheek, that the reason many owners cannot understand their cats is because the cats are speaking Turkish. The cat's vocal apparatus differs from our own and is not designed with speech in mind. However cats need to communicate, both with other cats and with owners.
Scent is also an important component of cat communication.
Since the sounds don't conform to our notion of grammatical structure, it simply appears that cats lack language. Most cat-owners, however, are aware that there are a whole variety of miaows that differ in pitch, rhythm, volume, tone and pronunciation. There is more to felinese that the simple miaow though. In 1944, Mildred Moelk made a detailed study of cat vocabulary and found sixteen meaningful sounds, which included consonants and vowels. I have received the same greeting from feral cats.