How to say in Czech: Is she learning Vietnamese on her own?

English
Is learning on her own?
Czech
Ona se učí vietnamsky jako samouk?
Is she learning Vietnamese?
She is learning Vietnamese.
Where did she learn Vietnamese?
Does she speak Vietnamese?
She does not speak Vietnamese.
She does not speak Vietnamese very well.
She speaks only a little Vietnamese.
She speaks Vietnamese.
She speaks Vietnamese fluently.
She speaks Vietnamese very well.

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