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

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

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