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

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

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