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

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

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