How to say in Czech: His native language is Lithuanian.

English
native language is
Czech
Jeho rodný jazyk je litevština.
Lithuanian is a difficult language.
His Lithuanian is getting better.
His Lithuanian is very good.
How good is his Lithuanian?
Is he learning Lithuanian on his own?
He is learning Lithuanian.
Is he learning Lithuanian?
Lithuanian is difficult.
Do you speak Lithuanian?
I do not speak Lithuanian.

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