That particular sound is defined in /interface/sound.gfx:
That wav file is indeed in /sound, altho notice it's 'send', not 'spend'.Code:china_grace_spend = { file = "grace_send.wav" volume = 50 on_demand = yes }
Hmm I guess you mean sound.sfx. Right now the validator is listing the files in /sound and cutting off ".wav", should it actually just consult this file for all the sounds instead?