Change commens text in post-meta.php

Hi!

Thank you for a very nice theme! ??

I′m trying to change the text “1 comment”, “No comment” etc. beneath the posts. I′ve been trying to do this in the post-meta.php file by replacing
(‘No comments’, ‘1 comment’, ‘% comments’, ‘comments-link’, ‘Comments closed’) with my choice of text. Some how it doesn′t work? Is there anything basic (or non-basic) I′m forgetting about? Anyone else having trouble with this?

I′m using a child-theme by the way.

Best regards, Anna