The 3 steps of first-setup overlap with vanilla-installer

[PlatonB]

The Language, Keyboard layout, Date and time steps are in both vanilla-installer and first-setup. I think it would be a good idea to follow Fedora's example by eliminating this clutter.

[muhdsalm]

These are left for the purpose of OEM. If you're installing by yourself these three things should already be set to the ones you selected in vanilla-installer

[PlatonB]

For an OEM, it's absolutely reasonable. For non-OEM, it makes the installation system feel a bit unfinished/untidy.

[PlatonB]

Fedora developers' thoughts on the subject: https://fedoraproject.org/wiki/Changes/ReduceInitialSetupRedundancy

[PlatonB]

Discussion in the Gnome bug tracker: https://bugzilla.gnome.org/show_bug.cgi?id=793501

[moonlitpath]

If you're installing by yourself these three things should already be set to the ones you selected in vanilla-installer

Doesn't seem like configuring keyboard layouts (see #328) and timezone in Vanilla Installer has any effect. You have to go through the same three steps again, and First Setup is in English.

[taukakao]

I think the best approach would be either to make an OEM installer iso or add a setting in the installer for OEMs.
It would then write a file into the install based on the setting, telling first-setup to either skip or don't skip the setup steps.