How to say in Czech: They are learning Lithuanian.

English
are learning
Czech
Oni se učí litevsky.
Are they learning Lithuanian?
Are they learning Lithuanian on their own?
Where did they learn Lithuanian?
Do they speak Lithuanian?
They do not speak Lithuanian.
They do not speak Lithuanian very well.
They speak Lithuanian.
They speak Lithuanian fluently.
They speak Lithuanian very well.
They speak only a little Lithuanian.

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