Hallo, could anyone please point me in the direction for writing a module with customizations to the menu structure like: 

• adding new menu items (top-level too)
• translating single menu items (without recurring to classic translation methods)
• change groups assigments

In a very rough example, it could be a replacement for menu "Sales": 

1. "My Sales" that inherits "Sales"
   • "CRM" instead of "Sales", and visible to managers only
     • "Clients" instead of "Customers"
2. Hide "Sales" menu

Thanks in advance