Each Page, Post and Custom Post Type can be translated into other languages using AIT Languages plugin.
It may happened that some of your translated pages are showing without problem on front-end and some of them redirect you to your default language. Why that happens?
Please check this ‘not showing” page if you’re able to edit and whether this page is still published. One of the reason can be that your translated page is in the trash. Therefore page cannot be display on Front-end. In this case, please go to Trash and restore you page.