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

English
Where did learn
Czech
Kde se naučili česky?
Are they learning Czech?
Are they learning Czech on their own?
They are learning Czech.
Do they speak Czech?
They do not speak Czech.
They do not speak Czech very well.
Are they Czech?
Are they from the Czech Republic?
They are Czech.
They are from the Czech Republic.

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