How to say in Czech: Where did you learn Japanese?

English
Where did learn
Czech
Kde ses naučil japonsky?
Are you learning Japanese?
Are you learning Japanese on your own?
I am learning Japanese.
Do you speak Japanese?
How do you say that in Japanese?
You do not speak Japanese very well.
I do not speak Japanese.
Does anybody here speak Japanese?
You speak Japanese very well.
Are you Japanese?

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