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

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

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