How to say in Czech: Are they learning Slovenian on their own?

English
Are learning on their own?
Czech
Oni se učí slovinsky jako samouk?
Are they learning Slovenian?
They are learning Slovenian.
Where did they learn Slovenian?
How good is their Slovenian?
Their native language is Slovenian.
Their Slovenian is getting better.
Their Slovenian is very good.
Do they speak Slovenian?
They do not speak Slovenian.
They do not speak Slovenian very well.

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