Why does my car always start in French? Weird

New to the forum. Picked up my DS7 E-Tense 4x4 360 La Premiere on Friday and love it, apart from a couple of weird things.

When I turn the car on, everything in is French… I have set the language to English on the Guest Profile and created my own Personal Profile with English as the language but all text on the screen is in French.

I also selected a colour scheme for me and created a Profile for the Mrs and changed the colours for her. Trouble is, when I switch between the two Profiles, the colour scheme fails to change too.