How to say in Czech: He speaks Russian fluently.

English
speaks fluently.
Czech
On mluví plynně rusky.
He speaks only a little Russian.
He speaks Russian.
He speaks Russian very well.
Does he speak Russian?
He does not speak Russian.
He does not speak Russian very well.
Does anybody here speak Russian?
He is learning Russian.
He is not Russian.
He is Russian.

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