Vulcan Language must sound musical to people’s ears.
Like, I know we’ve all seen the movies and shit, and splattered here and there are words and fragments of sentences of Vulcan here and there, but if you’ve ever looked at the way the language is written it’s clearly a symphonic ordeal. It is meant to be beautiful, as all things Vulcans are, and I believe then that the language too must be beautiful.
I think then, without the universal translator in place, and knowing that Vulcans speak in soft tones to one another since their ears pick up higher volumes already, that hearing Vulcans speak to each other would almost be like hearing a melody being born on the lips of an alien species. You don’t know what’s being said, but it sounds simply so pleasing that honestly, you prefer it that way: Knowing the words being said may ruin the experience entirely.
And if Vulcans sound musical without even trying, imagine what hearing one sing may be like.