How to say in Czech: Is he learning Portuguese?

English
Is learning
Czech
Učí se portugalsky?
He is learning Portuguese.
Is he learning Portuguese on his own?
Where did he learn Portuguese?
Does he speak Portuguese?
He does not speak Portuguese.
He does not speak Portuguese very well.
He speaks only a little Portuguese.
He speaks Portuguese.
He speaks Portuguese fluently.
He speaks Portuguese very well.

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