another user had a very similar issue and it turned out he had accidentally overwritten the person.gd file with one from plain Aric's Mod.
if you open person.gd, you might check if you have this code @line1697 or so:
if race_display in globals.dictionary.hybriddict:
var temp1 = "[color=yellow]Subspecies: "
var temp2 = "[/color]"
rvar = ' (' + temp1 + race_display + temp2 + ')'
else:
rvar = ' (' + race_display + ')'