Is the mod client-side?

Yes. It only changes what you hear, so it does not need to be installed on the server and other players are unaffected.

Which voice does it replace?

The French trader voice is swapped for the Darkest Dungeon announcer.

Is there a quieter version?

Yes, the author also provides a quieter build for players who find the narrator too loud.

KF2 Darkest Dungeon Announcer Trader Voice Mod

This is a small audio mod for Killing Floor 2 by the community author Cinder. It is client-side: it replaces the French-language trader voice lines with the booming announcer from the game Darkest Dungeon, so that every trader open, close and warning comes with the gothic narrator. Because nothing is changed on the server, you can use it in any match. It belongs with other trader-voice swaps such as GLaDOS and KF1 voices; if you would rather silence the narrators, see removing trader voice banks.

Video preview

Cover of the video preview for the Darkest Dungeon trader voice mod Video cover: the preview of the mod in action (https://youtu.be/0jYhFeRYyhg).

Downloads

The author distributes two builds through file hosting links posted on the mod's Reddit thread:

The standard version.
A quieter version, with a lower volume level for the replaced lines.

Installation follows the usual Wwise audio replacement idea: the modified sound files overwrite the trader voice files on your own client only. Back up the original files before replacing them so you can restore the default trader at any time. See custom music replacement with Wwise for the general process of working with KF2 audio files.

FAQ

Is the mod client-side?: Yes. It only changes what you hear, so it does not need to be installed on the server and other players are unaffected.
Which voice does it replace?: The French trader voice is swapped for the Darkest Dungeon announcer.
Is there a quieter version?: Yes, the author also provides a quieter build for players who find the narrator too loud.