Thanks for the link, but this doesn’t address my problem. My problem is very specific: the wrong menu content is showing up in the menu bar on the translated page.
This one is right: https://airtitesmokers.com/product/airtite-smoker/
This one is wrong: https://airtitesmokers.com/en-gb/product/airtite-smoker/
Notice how the two header menus are different. In the second link, it’s actually the contents of the footer menu.
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.