For me and a few others I've asked, the localisation file doesn't exist. I'm aware Codemasters hid it away (which is actually inside game.dat and is extractable through ego.nefsedit). However, I have ideas on how to re-encrypt it and repackage it inside the game.dat file so that the game picks it up.@Electronics any comment on that? Possible, yes, no? Might even be easier to replace the string \localisation\2020_release\ with \localisation\202X_modfile\ so just one version would already be enough.
Additionally, I had experimented extracting the language file, changing it and putting it in /localisation/2020_release but no luck on my end so far.