Munda languages are father tongues, but Japanese and Korean are not by Gyaneshwer Chaubey, George van Driem

“…Within the Austroasiatic language family, the Munda languages are a clear-cut case of father tongues, whereas Japanese and Korean are manifestly not. …”
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The Munda Maritime Hypothesis by Felix Rau, Paul Sidwell

“…On the basis of historical linguistic and language geographic evidence, the authors advance the novel hypothesis that the Munda languages originated on the east coast of India after their Austroasiatic precursor arrived via a maritime route from Southeast Asia, 3,500 to 4,000 years ago. …”
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