How to say in Czech: He speaks Croatian fluently.

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

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