How to say in Czech: They do not speak Russian very well.

English
do not speak very well.
Czech
Oni nemluví moc dobře rusky.
They speak Russian very well.
They do not speak Russian.
Do they speak Russian?
They speak only a little Russian.
They speak Russian.
They speak Russian fluently.
Does anybody here speak Russian?
Your Russian is very good.
Your Russian is getting better.
How good is your Russian?

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