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

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

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