How to say in Czech: He speaks Vietnamese very well.

English
speaks very well.
Czech
On mluví vietnamsky velmi dobře.
He speaks only a little Vietnamese.
He speaks Vietnamese.
He speaks Vietnamese fluently.
He does not speak Vietnamese very well.
Does he speak Vietnamese?
He does not speak Vietnamese.
Does anybody here speak Vietnamese?
Your Vietnamese is very good.
Your Vietnamese is getting better.
How good is your Vietnamese?

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