How to say in Czech: Where did they learn Estonian?

English
Where did learn
Czech
Kde se naučili estonsky?
Are they learning Estonian?
Are they learning Estonian on their own?
They are learning 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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