How to automatically register new user with specific email address

Hello on everyone, I am new in forums and I trying to setup a new forum that will only automatically register new members/users from specific email address i.e @domainname.gr. How can I do this?
Also I want to know if it is possible to use different languages English in Admin Interface and Greek in user Interface?

Thanks

Hello users, you should register them manually automatically, it is not possible,you can create specific groups with specific permissions,and add the users and their emails there.



It is also not possible 2 languages ​​in the forum, each one can set the language they want from their profile, but you can only use one for your work within the forum

When your request is complete, please mark it as Solved.