How to say in Czech: Is he learning Hungarian on his own?

English
Is learning on his own?
Czech
On se učí maďarsky jako samouk?
He is learning Hungarian.
Is he learning Hungarian?
Where did he learn Hungarian?
His Hungarian is getting better.
His Hungarian is very good.
His native language is Hungarian.
How good is his Hungarian?
He is Hungarian.
He is not Hungarian.
Is he Hungarian?

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