How to say in Czech: This is not my child.

English
This is not my child.
Czech
Tohle není moje dítě.
What is this child doing here?
Who is this child?
Whose child is this?
Why is this child here?
Do you know this child?
Does anybody know this child?
You are not a child anymore.
He is just a child.
Are you an only child?
I am a child.

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