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

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

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