Ojs 3.2 Multi Journal Page, Global Footer Design

I am using Ojs multi journal Page with a home page and many journals.
I want to set the footer on the home page and each journal to display the same footer.

What I have done so far is to create a custom child theme and add in the footer.tpl file the whole code for the footer.
Is there any other way to achieve the same result without adding the footer code inside the footer.tpl file.
Can I just use a variable in the footer.tpl file in order to retrieve the footer design from the admin footer text area?
Thank you