How to say in Czech: Do they speak Norwegian?

English
Do speak
Czech
Mluví norsky?
They do not speak Norwegian.
They do not speak Norwegian very well.
They speak Norwegian.
They speak Norwegian fluently.
They speak Norwegian very well.
They speak only a little Norwegian.
Does anybody here speak Norwegian?
Where did they learn Norwegian?
Are they learning Norwegian?
Are they learning Norwegian on their own?

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