Find a fluent English speaker friend, and hang out with him.

I dont know the answers. Sorry :(

"Con" is the standard random insult in French. It's rather vulgar ;-)
Originally, it is the word for female genitalia. It slowly evolved into something loosely pointing to reduced intelligence; a bit like "poor bastard", but more vulgar and insulting and without the paternalistic connotation.
I just watched the video - nothing really that shocking except the matter-of-fact delivery ;-) It's not what you expect from a head of state, but then again French politicians are here for entertainment...

No native Russian speaker would say it like that :-)

mystery solved.
I learn a little bit Russian => Я узнать немного русский

children book xD and cartoon

I asked my coworkers today. They thinks this question is so cute!!Actually "fiddle-i-fee" is more like a baby talk, a action with the sound. It does not have a solid meaning at all.