Comment box translation (via Child Theme)

Hello,

I want to display the comment box in Spanish. Specifically, translate these fields:
– Your real name *
– Your email *
– Your website

I found that this piece of code is under functions.php, but for some reason, when I copy that part of the code to my child functions.php I get an error. Can you please indicate me what piece of code should I paste in my functions.php child?

I attach my functions.php child.

Thank you very much.