Multi language website with Multi Domain


I am getting ready to publish a site for a customer and have a couple questions.

The website is Multi language website
for main website connected to for main language
other Domain I want to connect for secondary language

currently we have secondary language access like this = >
I need connect = >

sv = folder
hem => page Name

Here is my site Read-Only: LINK
(how to share your site Read-Only link)