Italian is Beautiful, German is Ugly
The sound of a language can have unfortunate social consequences. A harsh and unpleasant sounding language usually is not that beautiful as an elegant and cultural language. How do we make the distinction between different language and their sounding?
Accents in some languages are more attractive but this is a personal view only, what some like other hate. The consequence is that if you do not like a language you are less willing to listen and learn that specific language. Another option is that a person has a negative experience with that culture.
Languages are not beautiful or ugly but depending on the person's likings and judgements they are beautiful or ugly.
Baur, L., & Trudgill, P. (1998). Language myth. In Baur, & Trudgill, Language myths. London: Penguin Books.