Proposals for Austroasiatic substratum among later Austronesian languages in Western Indonesia, noteworthy among the Dayak languages, is strengthened by genetic data, suggesting Austroasiatic speakers were assimilated by Austronesian speakers.
pɹəpˈoʊzəlz fɔːɹ ˌɔːstɹoʊsɪˈæɾɪk sʌbstɹˈɑːɾəm ɐmˌʌŋ lˈeɪɾɚɹ ˌɔːstɹoʊnˈiːʒən lˈæŋɡwɪdʒᵻz ɪn wˈɛstɚn ɪndoʊnˈiːʒə, nˈoʊtwɜːði ɐmˌʌŋ ðə dˈeɪæk lˈæŋɡwɪdʒᵻz, ɪz stɹˈɛŋθənd baɪ dʒɪnˈɛɾɪk dˈeɪɾə, sədʒˈɛstɪŋ ˌɔːstɹoʊsɪˈæɾɪk spˈiːkɚz wɜːɹ ɐsˈɪmᵻlˌeɪɾᵻd baɪ ˌɔːstɹoʊnˈiːʒən spˈiːkɚz.