There is no site to become fluent in any language. Those will help you to improve your grammar, to enrich your vocabulary. You will become fluent only with practise.
In the sentence, 'Few Americans speak fluent French.', the pronoun (indefinite) is few; adjective fluent; verb speak.
he said in an interview that his children have leaned to speak fluent french
The name is francophone
Yes he does. And is very fluent in the language.
Fluent: English and German Fluent but spoken with difficulty: Russian and French
He can speak fluent French and a bit of Irish (Gaelic)
Probably not, but Harry can speak fluent French.
Yes, he speaks fluent German French and Spanish.
No, only Harry can :) x