How to say in Czech: How good is her Lithuanian?

English
How good is
Czech
Jak dobře umí litevsky?
Her Lithuanian is getting better.
Her Lithuanian is very good.
Her native language is Lithuanian.
Is she learning Lithuanian on her own?
How do you say that in Lithuanian?
I do not speak Lithuanian very well.
You speak Lithuanian very well.
He is learning Lithuanian.
Is he learning Lithuanian?
Lithuanian is a difficult language.

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