A bit off topic of course, but what's the source of the difference? To an untrained observer one would think that "hung" would definitely be the past participle form of "to hang".
The answers I am aware of go back to Old English...
a fusion of Old English hon "suspend" (transitive, class VII strong verb; past tense heng, past participle hangen), and Old English hangian "be suspended" (intransitive, weak, past tense hangode); also probably influenced by Old Norse hengja "suspend," and hanga "be suspended."
https://www.etymonline.com/word/hangHung emerged as past participle 16c. in northern England dialect, and hanged endured only in legal language (which tends to be conservative) in reference to capital punishment and in metaphors extended from it (I'll be hanged).