6. Substrata
Today, Austroasiatic substrata and loanwords can be found in:
East Asian region
Hmong-Mien
Kra
Be
Jiamao
Northeast India region
Lepcha
Kuki-Chin-Naga
Sal
Tani
Mru-Khongso
Insular Southeast Asian region
Acehnese
Kerinci Malay
Bornean languages
Genetic evidence (distribution of Y-DNA haplogroup O2a) strongly supports this.