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

English
Where did learn
Czech
Kde se naučil chorvatsky?
He is learning Croatian.
Is he learning Croatian?
Is he learning Croatian on his own?
Does he speak Croatian?
He does not speak Croatian.
He does not speak Croatian very well.
He is Croatian.
He is not Croatian.
He speaks Croatian.
He speaks Croatian fluently.

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