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

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

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