Frontpage is a menu item...title won't change
Just deactivate the predefined menu link and add a new one - use

&lt;front&gt;


as path.

In Drupal 7 and 8 go to

Home &gt; Administration &gt; Structure &gt; Menus &gt; Main menu &gt; Add link


Drupal 7


See tooltip for details (using Rubik Theme)