How to say in Czech: Their Italian is getting better.

English
is getting better.
Czech
Jejich italština se zlepšuje.
I do not speak Italian very well.
You speak Italian very well.
How good is their Italian?
Their Italian is very good.
Their native language is Italian.
Are they learning Italian on their own?
He is Italian.
He is learning Italian.
He is not Italian.
Is he Italian?

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