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

English
Where did learn
Czech
Kde se naučili slovensky?
Are they learning Slovak?
Are they learning Slovak on their own?
They are learning Slovak.
Do they speak Slovak?
They do not speak Slovak.
They do not speak Slovak very well.
Are they Slovak?
They are not Slovak.
They are Slovak.
They speak only a little Slovak.

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