Russian is not that difficult regarding vocabulary but eventually regarding grammar (it's said that there are 1.000 exceptions) and pronunciation. I thought it's easy to learn.
I am always suprised (or actually not) that our bro'sis from the Netherlands speak perfect German while just a infinitesimal small group of Germans can speak Dutch.
For me Finnish/Hungarian sounds very difficult to learn.
My father can speak some Hungarian. Else I'd say that grumpy Dardi has a very difficult mother tongue (->Gaelic) and Cymraeg is probably jawbreaker too.
