How to say in Czech: He speaks only a little Portuguese.

English
speaks only a little
Czech
On mluví jen trochu portugalsky.
He speaks Portuguese.
He speaks Portuguese fluently.
He speaks Portuguese very well.
Does he speak Portuguese?
He does not speak Portuguese.
He does not speak Portuguese very well.
Does anybody here speak Portuguese?
He is learning Portuguese.
Is he learning Portuguese?
Is he learning Portuguese on his own?

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