How to say in Czech: Do they speak Slovak?

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

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