Which foreign language do you think, is the hardest to learn?

Arabic is the most difficult one then Russian

I think that the first is Chinese ,than Arabic ,but the Basque language - Euskara - can be considered one of the hardest languages in the world to learn. This language is not connected with any other language group, not matter live or dead.

Probably it would be Japanese!

I think Chinese and languages of east Asia in general 

اi think the languages that hve no roots in the mother tongue

formal Arabic and Japanese

 the most difficult language in the world French or Spanish                                    

 the japanese language is the hardest to learn

it's  the arabic language and its difficult rules and varios meanings of words