If it's block with links then you can create your own custom menu and then use it in 'menu' block. You will need to change the menu via Navigation builder to reflect changes in all blocks where this menu is displayed.
Tip: if you want to make menu items highlighted on current page then make sure that menu item name match page name. 

Another option is to use 'lang' block, then you can change the language key via Polyglot app to make changes in all blocks with the same language key.