I'm sorry Joshua, seems to be an issue with polylang or/and your language settings. Since you have the same issue with other themes is not a customizr issue.
I don't know polylang very well.
I see you replied to this:
https://wordpress.org/support/topic/my-menu-doesnt-change-with-the-language
In the author post is stated
"Please don't use this topic to ask your support question."
You should open a new topic in their plugin support forum.