How to say in Czech: She speaks Vietnamese fluently.

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

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