Translated URLs and redirects
A translated handle gives each language its own address. The app writes the redirect every change needs.
What a handle is
The handle is the part of the URL after /products/ or /pages/. Translated, Spanish becomes /es/products/caja-de-madera instead of /es/products/wooden-box. That helps ranking in each language.
Redirects
Change a handle — in the original or in a translation — and the old address leads nowhere. So the app automatically creates a 301 redirect from the old address to the new one, repairs existing redirect chains on the way, and removes a redirect when you go back to the old handle.
Automatic re-translation
Handles are only re-translated automatically if you explicitly switch that on as well — changing a URL is a decision of its own. Even then a handle is only refreshed where it was already translated, and only where a redirect is possible. Blog handles are never changed automatically, because a redirect cannot cover the articles underneath.