aside of this idiotic lettering, another major issue at CDG is the chaotic transfer from one terminal to another or when you stay in a hotel near Terminal 3 and you need to get out for it when you are new to CDG, the signage is absolutely no clear at all

getting to another terminal is an adventure itself

you take the stairs or elevators then you get the monorail to gate K, L or M, then you walk out and need to take a bus

just got back from a family visit in the US, in Atlanta, you get on a metro that connects all terminals and that's it