I need to create users in the backend which currently works. After adding the user, he gets an email currently in english. I want to make this dynamically to the given language in the backend user creation form.

Currently there is no option to directly pass a specific language or parameter while creating the user in the backend.

How can I basically add an additional field to the user creation form, so that I can check wether the email shall be sent out in english or any other language.