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

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

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