For example, here:
1. Naming the tab "List links" is confusing, because you've got to understand that a menu item is a link. Suggest change to "Manage menu Items." Since the same applies to "Add link" and "Menu link," they should be changed to "Add menu item" and "Menu item." (Usability experts will correct me, but since theming makes the listed menu items behave like links, with underlines and so on, we don't have to have the word "link" as well.)
2. Naming the tab "Edit menu" is confusing, because (a) for the root menu, all you get is the Description, so where's the menu, and (b) for other menus, you get a page that's titled "Edit menu link," which is not the same as "Edit menu." Suggest changing both tab and page title to "Edit menu item."