I have learned Portuguese, English, Spanish and French and, in my opinion, French is the most difficult of all languages I learn.
I think the hardest is Arabic
are many dialects in Saudi Arabia
to have five different accents
and often difficult to understand what they say
The one you can't practice often enough.
Everything else gets easier, sooner or later.
in fact i think french is not very difficult .Arabic is widely accepted the most difficult language in the world, and the second is chinese :) by the way, i like a brazilian football player since i was in middle school, kaka lol
I think that Chinese, Japanese and Korean are more difficult than French