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

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

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