For me, there is no such a thing as "the most beautiful language". I think every language is amazing, not just pronunciation but also the specific vocabulary you can find in some languages and might not exist in others, how grammar works, etc. If we talk about how a language sounds, I've always been quite attracted to Japanese and German (yeah, that language a lot of people call aggressive). Also, spoken Korean sounds great to me but I can't really stand when it's singing. But like, it's crazy, when you get into linguistics and you read so much about how different languages are... every single one becomes so special!

For me, of course, its chinese. there are lots of chinese people here, I have no idea why few chinese people answered this question.

as a native chinese speaker, I figure there wouldnt any language more beautiful than chinese, especially Mandairan, although either italian or english pronounces quite well. whenever I listen to chinese poems reading, i feel shocked and even moved.

after all, mother language is always special for most people. :)