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

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

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