Genetic distances on Sumba (A and C) and Timor (B and D), between all pairs of individuals (A and B) and only between individuals who speak a common language (C and D). Conditioning on language sharing reveals three distinct clusters in the Sumba data (C), showing evidence of village endogamy (e), ambilocality or neolocality (an), and patrilocality (p). For Timor, the high degree of multilinguality means that most pairs of individuals in B are also included in D. B and D are dominated by matrilocality (m) and ambilocality or neolocality (an), with a small patrilocal cluster (p).