liathróidí are balls, but testicles are colloquially referred to as stones, at least by Scottish Gaelic speakers I've heard

I don't have time just now to search for info., but I though shanty towns were originally where Irish emigrants stayed. You're welcome to offer evidence pro or contrary.I don't know how long the word has been in English. I do think I've read it in American novels circa 1920-30. You'd have to consider the use of "tigh" in Irish at the time the word shanty starts appearing in English rather than its use at present