How to set a default culture for packaged game

It seems that by default the packaged game detects the OS 's language setting and uses that as the default culture. I want to explicitly set a default culture for packaged game that is different from the OS and from the editor environment. I found a picture on the internet which shows an option called “Package default localization” under project settings:

However, I can’t find this option in 4.26. Has this option been removed? Can I edit one of the ini files to achieve the same effect as having this option ticked?

Thanks in advance for answering.