I am using the SJ Charly template with multiple languages. The template came with English (UK) and Arabic, and I am going to replace them with English (US) and Spanish once I'm confident I haven't broken everything.

My problem is that after switching to my new English (US) stuff, I seem to have lost the main menu for English (UK), and I can't identify which module is supposed to display the main menu. (I have scoured the module list multiple times to no avail.) Furthermore, when I append ?tp=1 to the URL, I see positions defined for everything except the main menu. It just seems to exist on the page by virtue of its own free will.

There are at least three other menus in the template attached to a variety of modules, but each one of those displays as some type of sidebar, and not as the main menu. Please advise on how to enable the main menu through a module.

Functioning main menu example: theoverflow.org/m/index.php/en-us/?tp=1
Missing main menu example: theoverflow.org/m/index.php/en-gb/?tp=1