How to say in Czech: They speak only a little Slovak.

English
speak only a little
Czech
Oni mluví jen trochu slovensky.
Do they speak Slovak?
They do not speak Slovak.
They do not speak Slovak very well.
They speak Slovak.
They speak Slovak fluently.
They speak Slovak very well.
Does anybody here speak Slovak?
Are they learning Slovak?
Are they learning Slovak on their own?
Are they Slovak?

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