How to say in Czech: His Ukrainian is getting better.

English
is getting better.
Czech
Jeho ukrajinština se zlepšuje.
I do not speak Ukrainian very well.
You speak Ukrainian very well.
His Ukrainian is very good.
How good is his Ukrainian?
His native language is Ukrainian.
Is he learning Ukrainian on his own?
He is learning Ukrainian.
He is not Ukrainian.
He is Ukrainian.
Is he learning Ukrainian?

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