How to say in Czech: How good is her Latvian?

English
How good is
Czech
Jak dobře umí lotyšsky?
Her Latvian is getting better.
Her Latvian is very good.
Her native language is Latvian.
Is she learning Latvian on her own?
How do you say that in Latvian?
I do not speak Latvian very well.
You speak Latvian very well.
He is learning Latvian.
Is he learning Latvian?
Latvian is a difficult language.

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