How to say in Czech: How good is his Spanish?

English
How good is
Czech
Jak dobře umí španělsky?
His Spanish is getting better.
His Spanish is very good.
How do you say that in Spanish?
I do not speak Spanish very well.
You speak Spanish very well.
His native language is Spanish.
Is he learning Spanish on his own?
He is learning Spanish.
He is not Spanish.
He is Spanish.

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