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

English
Is learning on his own?
Czech
On se učí slovinsky jako samouk?
He is learning Slovenian.
Is he learning Slovenian?
Where did he learn Slovenian?
His native language is Slovenian.
His Slovenian is getting better.
His Slovenian is very good.
How good is his Slovenian?
Does he speak Slovenian?
He does not speak Slovenian.
He does not speak Slovenian very well.

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