Most Difficult Languages to Learn

Guys
I´ve recently read an article which explains these are the most difficult languages to learn... Do you agree?:

Hindi
Danish
Hungarian
Croatian
Hebrew
Korean
Thai
Vietnamese
Arabic
Traditional Chinese

I think it depends on your mother tongue. But, yes, probably these are the most difficult ones for us Spanish/English speakers.

Yes, I agree with you, because if you are a native speaker for Hindi or Arabic it will be a lot easier to learn Swahili than for an English native, for instance.
And it´s also true that the more languages you learn, the easier it is to understand them!
I love this :)