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

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

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