How to translate a template portfolio filter

I am using AVADA last version on WP last version. While trying to design a portfolio page with a filter for selecting images according to their categories, one item of the menu (“All”) that selects all categories needs to be translated. I found the exact line of html code in the index page of my url. I see the classes, and all, but I don’t seem to find this file in the server? I understand the page is dynamically built, but somewhere in the server there should be a file where I could edit this “all” word that pops up automatically in the filter menu.

Does anyone knows how to solve this problem?

Thank you.