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

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

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