How to implement multiple domain names for a site: for a common front end + multiple multilingual implementations of the backend

Currently in the project development process, the service side voice some use Python, some use Java, some use node ...

But the back end of the multiple languages in a large scope, belong to a project, together to complete a large product, so need a common front-end ...

Need to solve the problem:

1, a front-end into multiple modules, different modules can use different back-end

2, multiple backend on the front-end implementation through multiple domain names or ports: So different backend can be deployed separately

3, multiple back-end use common authentication mechanism, can adopt unified check module

Solution:

For question 1, you can use the base tag of the HTML

Reference:

1, http://www.w3school.com.cn/tags/tag_base.asp

How to implement multiple domain names for a site: for a common front end + multiple multilingual implementations of the backend