How to say in Czech: He speaks Arabic fluently.

English
speaks fluently.
Czech
On mluví plynně arabsky.
He speaks Arabic.
He speaks Arabic very well.
He speaks only a little Arabic.
Does he speak Arabic?
He does not speak Arabic.
He does not speak Arabic very well.
Does anybody here speak Arabic?
He is learning Arabic.
Is he learning Arabic?
Is he learning Arabic on his own?

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