> Or maybe the keyboard layout isn't yet set when the password is entered (example: full disk encryption password at boot) and you risk that a user is entering a password at install time, but what they write at boot is actually different.
This is a very good point, which already made me struggle when setting up new computers. For instance, the Ubuntu installer runs in a Gnome environment with my keyboard layout active. The disk encryption prompt runs shortly after the BIOS screen and will likely have some US keyboard layout. If you choose anything special for your password, you'll have a hard time figuring out how to type it in a different keyboard layout.
I work for a German company. You bet that I know to find most symbols on a German keyboard layout. Thankfully the base letters contain only one swap.
For extra fun, one colleague in particular likes to set excessively long passwords of like 50 characters when it is not expected that anyone will ever have to type them. The number of times I had to type one of these because this sysadmin works remotely and I'm the hands in the office when needed...
It's just another thing to remember to set. The keyboard layout CAN be set at boot (I do it), but it's separate from the keyboard layout in a graphical session.
This is a very good point, which already made me struggle when setting up new computers. For instance, the Ubuntu installer runs in a Gnome environment with my keyboard layout active. The disk encryption prompt runs shortly after the BIOS screen and will likely have some US keyboard layout. If you choose anything special for your password, you'll have a hard time figuring out how to type it in a different keyboard layout.