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

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

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