the art of music isnt dictated by just individual parts alone, its the joining together of these parts and what the combined result is about. Guitars, bass, drums, vocals, keyboards, brass.
I listen to English, German, Dutch, Finnish, Norwegian, Russian/Ukranian, Chinese, French, Portuguese, Greek, Italian and Polish bands, even a few bands who do their vocals in Latin, who use their own languages as well as english. Lyrical content alone does not make a piece of music a piece of music.