Add a customer as a partner in site administration

Today, by sending an invitation to the customer as a partner or editor to the site, a generic message is sent to the recipient, by WIX.
Most customers, not so understanding how to move forward with the message.
We’ve even encountered customers without a WIX account who don’t know how to move forward.
I’m missing two options:

  1.   Sends a message in the customer's source language (depending on the country in which the site was built or by my choice.) 
    
  2.   A higher priority, give us an option, so the text can be edited by us, in the message sent to the customer. 
    

Thank you and an amazing day for everyone.
Guy