Automated Cognate Detection as a Supervised Link Prediction Task with
  Cognate Transformer
V. S. D. S. Mahesh Akavarapu Arnab Bhattacharya
Identification of cognates across related languages is one of the primary
problems in historical linguistics. Automated cognate identification is helpful
for several downstream tasks including identifying sound correspondences,
proto-language reconstruction, phylogenetic classification, etc. Previous
state-of-the-art methods for cognate identification are mostly based on
distributions of phonemes computed across multilingual wordlists and make
little use of the cognacy labels that define links among cognate clusters. In
this paper, we present a transformer-based architecture inspired by
computational biology for the task of automated cognate detection. Beyond a
certain amount of supervision, this method performs better than the existing
methods, and shows steady improvement with further increase in supervision,
thereby proving the efficacy of utilizing the labeled information. We also
demonstrate that accepting multiple sequence alignments as input and having an
end-to-end architecture with link prediction head saves much computation time
while simultaneously yielding superior performance.