How to say in Czech: His Greek is very good.

English
is very good.
Czech
Jeho řečtina je velmi dobrá.
I do not speak Greek very well.
You speak Greek very well.
His Greek is getting better.
How good is his Greek?
His native language is Greek.
Is he learning Greek on his own?
Greek is a difficult language.
Greek is difficult.
He is learning Greek.
Is he learning Greek?

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