Following text confirmed true by me, original comment by "DJ_Edyo"

in
"/Left 4 Dead 2/Update/resource" folder, search for a file named: l4d360ui_tu_english.txt
And copy this code to the end of the file.

"Language" "English"
"Tokens"
{

"L4D360UI_NamVet" "Alina Seo"
"L4D360UI_TeenGirl" "Isa"
"L4D360UI_Biker" "Kolibri"
"L4D360UI_Manager" "Ara"
"L4D360UI_Mechanic" "Ariane"
"L4D360UI_Coach" "Starling"
"L4D360UI_Producer" "Elster"
"L4D360UI_Gambler" "Falke"

// Loading posters
"L4D360UI_Loading_As_Zoey" "as Isolde Itou"
"L4D360UI_Loading_As_Bill" "as Alina Seo"
"L4D360UI_Loading_As_Francis" "as KLBR-S2301"
"L4D360UI_Loading_As_Louis" "as ARAR-S2301"
"L4D360UI_Loading_As_Coach" "as STAR-S2301"
"L4D360UI_Loading_As_Ellis" "as Ariane"
"L4D360UI_Loading_As_Rochelle" "as LSTR-512"
"L4D360UI_Loading_As_Nick" "as FKLR-S2301"

"testcommands" "<clr:255,0,0>This is red<I> and italics<B> and<cr>bold<B><I><clr:255,255,255> white again."

}
}

If you haven’t done so already, check the comments of the old obsolete name change mod, it could help or give clue, because I’m nowhere near able to tell you when I’ll be able to fix this mod

an update might have messed this mod up due to file locations changing if it did happen. My PC is currently out of order so I don’t know when I’ll be able to fix this.

i cant seem to get this to work? just subscribing too it doesnt work and doing something similar to a different name changer mod i had years ago, where i move the mod file to a different location, didnt work either? so im unsure how to get this to work