How do I change "0 Comments" to "Leave a Comment"?

I changed the code in my template to make “0 Comments” change to “Leave a Comment” but it is not showing up on the home page If you click on a post you can see that my code takes effect, yet the home page won’t show it. I’ve been told by another coder that unless the tags are blatantly specified in the wp-loop.php file, the home page won’t show it. The only problem is that I cannot figure out what to precisely specify to make this appear. My site is:

https://www.TheDishmaster.com

and for an example of an individual post where you can see the code take effect, go to:

https://thedishmaster.com/2011/09/happy-labor-day-dishmaster-vacation.html

Help is much appreciated!