Wanton is not "yun tun" in Mandarin, it's "hun tun" (馄饨) but it does have a lot of local variance; most people I know in the north tend to say "dun" but the two sounds are pretty similar if said fast. Neat article though and I agree that food terms are impossible to translate, especially as single terms. They need context.
Slightly surprised they didn't mention "spit/saliva/drool chicken" (口水鸡) but I guess there is only so much room and way to many examples!