- we don't need any PHP or coding customization, just modify the admin panel to support multi-store and multi-language (RTL).
- create a custom simple block to order items that not available in our site.
- rearrange the default appearance (for example: moving the bulit-in blocks)
- more details in attachment file.
lets proceed . We have just completed a change and correction in prestashop site , can check in pastwork. So have complete knowledge of your requirement.