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

English
Is learning on her own?
Czech
Ona se učí chorvatsky jako samouk?
Is she learning Croatian?
She is learning Croatian.
Where did she learn Croatian?
Is she Croatian?
She is Croatian.
She is not Croatian.
Does she speak Croatian?
She does not speak Croatian.
She does not speak Croatian very well.
She speaks Croatian.

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