How to say in Czech: Where did they learn Greek?

English
Where did learn
Czech
Kde se naučili řecky?
Are they learning Greek?
Are they learning Greek on their own?
They are learning Greek.
Do they speak Greek?
They do not speak Greek.
They do not speak Greek very well.
They speak Greek.
They speak Greek fluently.
They speak Greek very well.
They speak only a little Greek.

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