I probably should buy both of these.

"Professor shares his family’s secret language" — Harvard Gazette

https://news.harvard.edu/gazette/story/2020/12/professor-shares-his-familys-secret-language/

"The Cut Out Girl, by Bart Van Es"

https://www.draliceviolett.com/the-cut-out-girl-by-bart-van-es/

I've checked them out on more than one occasion.