How to say in Czech: Their Latvian is very good.

English
is very good.
Czech
Jejich lotyština je velmi dobrá.
I do not speak Latvian very well.
You speak Latvian very well.
How good is their Latvian?
Their Latvian is getting better.
Their native language is Latvian.
Are they learning Latvian on their own?
He is learning Latvian.
Is he learning Latvian?
Latvian is a difficult language.
Latvian is difficult.

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