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

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

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