How to say in Czech: She speaks Serbian fluently.

English
speaks fluently.
Czech
Ona mluví plynně srbsky.
She speaks only a little Serbian.
She speaks Serbian.
She speaks Serbian very well.
Does she speak Serbian?
She does not speak Serbian.
She does not speak Serbian very well.
Does anybody here speak Serbian?
Is she learning Serbian?
Is she learning Serbian on her own?
Is she Serbian?

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