Custom kill messages

i followed an old YT video. it had me add “testLocalization:b=yes” under debug in the config.blk then the game wouldn’t launch. i tinkered around a little and the game would launch after i removed the “testLocalization:b=yes” that i originally had in the config.blk file but my funny kill message didn’t change.

is there a new way of doing it now? do i need a different command/code somewhere else.

the video i used