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

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

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