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

English
do not speak
Czech
Oni nemluví řecky.
They do not speak Greek very well.
Do they speak Greek?
They speak Greek.
They speak Greek fluently.
They speak Greek very well.
They speak only a little Greek.
Does anybody here speak Greek?
Where did they learn Greek?
Are they learning Greek?
Are they learning Greek on their own?

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