How to say in Czech: They speak Chinese very well.

English
speak very well.
Czech
Oni mluví čínsky velmi dobře.
They do not speak Chinese very well.
Do they speak Chinese?
They do not speak Chinese.
They speak Chinese.
They speak Chinese fluently.
They speak only a little Chinese.
Does anybody here speak Chinese?
Your Chinese is very good.
Your Chinese is getting better.
How good is your Chinese?

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