I am developing a Debian GNU/Linux-based operating system/distribution. It's for visually impaired people. I took the "standard" Debian Live CD and built my distribution from a bare metal command line. Here are some features:
Xfce desktop, heavily modified for the visually impaired;
High contrast themes, icons and color schemes;
Pre-configured Orca screen reader;
An intuitive and simple screen magnifier;
Basic set of desktop applications, logos, wallpapers and bash scripts made by me.
The system is pretty much ready and installable, in some kind of "alpha" state. I don't have a name for it yet, so I call it "Redebian" and use this name in my scripts. I will present it in a science and technology fair in my school in August (I'm currently in High School), so the project is very important for me.
But one thing is bothering me: I don't know how to properly change my OS name from Debian to whatever its name will be. I googled for several days and got suggestions to edit
/etc/issue and a few more files, but I am afraid to break the system. I'm using the official Debian repositories, so the release name is a very fragile factor.
What should I do to safely and properly change the name of my Debian-based operating system? For example, I want it to show "Welcome to Redebian" when the system is booting instead of "Welcome to Debian". And I want the
update-grub script to recognize the system as "Redebian".