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

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

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