Proto Nostratic
Dolgopolsky, A.の Nostratic Dictionaryに準拠
https://web.archive.org/web/20110611110047/http://www.dspace.cam.ac.uk/bitstream/1810/196512/49/00ND_ALL.pdf
子音
https://scrapbox.io/files/65dfd8e965180b002507492e.png
Swadesh–Yakhontov list
https://rentry.co/8cb7w4oa