How to say in Czech: How good is her Slovak?

English
How good is
Czech
Jak dobře umí slovensky?
Her Slovak is getting better.
Her Slovak is very good.
Her native language is Slovak.
Is she learning Slovak on her own?
How do you say that in Slovak?
I do not speak Slovak very well.
You speak Slovak very well.
He is learning Slovak.
He is not Slovak.
He is Slovak.

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