How to say in Czech: Are you learning Japanese on your own?

English
Are learning on your own?
Czech
Ty se učíš japonsky jako samouk?
Are you learning Japanese?
They are learning Japanese.
Where did you learn Japanese?
How good is your Japanese?
Your Japanese is getting better.
Your Japanese is very good.
Are you Japanese?
Do you speak Japanese?
You speak Japanese very well.
How do you say that in Japanese?

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