Yes, we do have a feature that lets you "connect" a book to indicate that it is a translation of one of your books which is written in another language.
To do this, go into the "author app" for your book, then go to the Settings page, and then choose the About page.
On this page, you will see a "Translated From" dropdown menu that will show all of your books. You can then choose the book that your book is a translation of.
Then, click the blue "Update Book" button to save it.
The following screenshot shows this for a book which was translated by our TranslateAI service from English into French. (Actually, it was translated into all 31 languages that TranslateAI supports as part of our GlobalAuthor bundle!)