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

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

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