How to say in Czech: Are they learning Estonian?

English
Are learning
Czech
Učí se estonsky?
Are they learning Estonian on their own?
They are learning Estonian.
Where did they learn Estonian?
Do they speak Estonian?
They do not speak Estonian.
They do not speak Estonian very well.
They speak Estonian.
They speak Estonian fluently.
They speak Estonian very well.
They speak only a little Estonian.

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