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

English
Are learning on their own?
Czech
Oni se učí španělsky jako samouk?
Are they learning Spanish?
They are learning Spanish.
Where did they learn Spanish?
How good is their Spanish?
Their native language is Spanish.
Their Spanish is getting better.
Their Spanish is very good.
Are they Spanish?
They are not Spanish.
They are Spanish.

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