The Swadesh wordlists for five Kam-Sui idioms. Most of the data are taken from field records collected under the supervision of Ilya Peiros in 2000-2003 for the Intercontinental Dictionary Series Project (IDS).
The wordlists are linked to the Kam-Sui etymological database; however, since the latter is currently based on older publications on Kam-Sui historical linguistics, not specifically connected with the IDS project, it should be noted that there are some discrepancies between the two databases. Namely, they do not agree as to the number of languages involved, and also, for many of the items found in the wordlists no etymologies are available, even though many of them most certainly reflect older Proto-Kam-Sui roots, because these etymologies were not found in the sources used. A more proper coordination between the wordlists and the etymologies is an important task for future research.
Results of lexicostatistical calculations, reflected in the tree diagram available on the site, show that the disintegration of Kam-Sui took place somewhere around the 1st century AD, with most of the idioms separating approximately at the same time, which does not allow us to establish a proper sub-classification for this family.