We once had to make another wordpress multilanguage site on a different domain but it should use the whole footer from previous site full with its images and sitemaps. The client said "just make it look like a copy of a footer". This would require us to copy the whole footer for 4 different languages every time somebody makes a change in the original site.

So the workaround we did in the end was to make a specific page in original wordpress site which only returns the footer.

In the new wordpress site we made a code which scrapes that whole page and puts its contents on the footer of the new wordpress site.

It worked perfectly and we never needed to copy the whole footer again because it was "dynamic".