How to say in Czech: Her Serbian is getting better.

English
is getting better.
Czech
Její srbština se zlepšuje.
Her Serbian is very good.
How good is her Serbian?
I do not speak Serbian very well.
You speak Serbian very well.
Her native language is Serbian.
Is she learning Serbian on her own?
He is learning Serbian.
He is not Serbian.
He is Serbian.
Is he learning Serbian?

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