Savosavo and Bilua, despite being the most distant languages geographically, both split more recently than Lavukaleve and Touo according to Pedrós.

[2] An automated computational analysis (ASJP 4) by Müller et al. (2013)[3] grouped Touo, Savosavo, and Bilua together.

However, since the analysis was automatically generated, the grouping could be either due to mutual lexical borrowing or genetic inheritance.

The reconstructions are the following: Central Solomon numerals from Pedrós (2015): As the comparisons indicate, lexical evidence for the relatedness of the four languages is limited.

If one sets apart the obvious loanwords from Oceanic languages (e.g. batu, vatu for “head”, susu for “breast”), the number of potential cognates across these four varieties is evidently very low.