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

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

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