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

English
is getting better.
Czech
Jejich lotyština se zlepšuje.
I do not speak Latvian very well.
You speak Latvian very well.
How good is their Latvian?
Their Latvian is very good.
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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