Least attractive-sounding European language

[Wanderlust]

While I absolutely adore my native language,I've been told by many who don't that they don't find it attractive-sounding at all.It's also probably one of the very few languages that you can't understand a word if you don't speak it.

[Arthur Scharrenhans]

This surprises me. Corsican is the language outside of Italy that is the closest (at least lexically) to standard Italian. I've seen Corsican written and it looks pretty close when you compare them side by side.

Yes, it's the closest to standard Italian as it is more or less a dialect of Tuscan. But its pronunciation has some peculiarities that make it sound, uhm, debased, coarse and idle at the same time (not a very scientific or useful descriptions; I can't express it very well even in my own language, but it's a specific feeling. It almost sounds like Tuscan with a Southern Italian accent. Or so it does when I listen to it on the web; I've been to Corse, but heard mostly French from the locals).

[Aces High]

Dutch.

It sounds like they are speaking English whilst drunk with a mouth full of marbles.

[Sikeliot]

After thinking about it, I'm gonna go with Brazilian Portuguese for this even though it's not technically "European" but you get the point. The drawn out vowel sounds make the one speaking sound slow/retarded.

[Comte Arnau]

While I absolutely adore my native language,I've been told by many who don't that they don't find it attractive-sounding at all.It's also probably one of the very few languages that you can't understand a word if you don't speak it.

Greek? Come on, if there's something every European language has got, that's words of Greek origin: photography, xenophobia, anthropology, alphabet, microscope, astronomy, pterodactyl, democracy, zoophilia, psychiatrist, hippopotamus...

[Magister Eckhart]

I cannot believe that I am the only person who finds Yiddish to be the most annoying language spoken in Europe.

[Peyrol]

Danish, notoriously, sounds like vomiting.
I'm not fond of Slavic languages, too.
Dutch is harsh but funny, I wouldn't say it's the sweetest or the most elegant but I can't really say it's horrible. Same for Scots.
Corsican is probably the European language (or dialect) which I find subjectively ugliest. (Among those that I've heard, of course).

I disagree with my fellow Italians who dislike Sicilian. It's a noble language and it can be very, very attractive. Calabrese sounds like Sicilian with massive aspiration on every consonant, and I agree it's not as pretty. I don't love Neapolitan. But the ugliest dialects of Italy are generally those found on the Eastern coast (Romagnolo, Marchigiano, Abruzzese, Pugliese...).

As a piemonteis with bergamask/venetian/roman background, i can say...sicilian sounds "strange".

[askra]

southern sardinian language (Campidanese) sounds awful to my ears

[Laubach]

Portuguese from Portugal is Horrible like American English

[Rouxinol]

I dislike the sound of most of the Slavic languages.