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

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

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