How to say in Czech: Where did he learn Serbian?

English
Where did learn
Czech
Kde se naučil srbsky?
He is learning Serbian.
Is he learning Serbian?
Is he learning Serbian on his own?
Does he speak Serbian?
He does not speak Serbian.
He does not speak Serbian very well.
He is not Serbian.
He is Serbian.
He speaks only a little Serbian.
He speaks Serbian.

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