The likening of language to music has a long history. No further evidence is needed than the phrase in English of speech being “music to one’s ears,” etc. Since English is now the world’s lingua franca, many people are heard speaking the language who are not native speakers or who have learned to speak it imperfectly and do so badly. One is tempted to call this kind of speech cacolalia, a nonce word combining the Greek element for ‘bad, evil’ with the Latin for ‘speech’.
When one hears such cacolalia constantly on the BBC World Service (as does Y-H-B in the middle of the night), as a musician one is left with the impression that this is speech produced by a human instrument played badly, as one would hear emanating from a musical instrument played badly. This phenomenon actually brings up a genuine linguistic mystery: why is it that human beings who use language as non-native speakers routinely do it so badly? In other words, why is cacolalia the norm? What is it about the human linguistic capacity that prevents speakers from learning to speak a foreign language well?
Interestingly, this phenomenon concerns the phonic aspect of speech and not the grammar. There are innumerable people, for instance, who speak English with perfect grammar despite their cacolalia, and next to none who do so with an impeccable English accent. ¿Quién sabe?