Vietnamese has been so heavily influenced by Chinese that its original Austroasiatic phonological quality is obscured and now resembles that of South Chinese languages, whereas Khmer, which had more influence from Sanskrit, has retained a more typically Austroasiatic structure.
vˌiːɛtnəmˈiːz hˈæzbiːn sˌoʊ hˈɛvili ˈɪnfluːənst baɪ tʃaɪnˈiːz ðæt ɪts ɚɹˈɪdʒɪnəl ˌɔːstɹoʊsɪˈæɾɪk fˌɑːnəlˈɑːdʒɪkəl kwˈɔlᵻɾi ɪz əbskjˈʊɹd ænd nˈaʊ ɹᵻzˈɛmbəlz ðæt ʌv sˈaʊθ tʃaɪnˈiːz lˈæŋɡwɪdʒᵻz, wˈɛɹæz kmˈɪɹ, wˌɪtʃ hæd mˈoːɹ ˈɪnfluːəns fɹʌm sˈænskɹɪt, hɐz ɹᵻtˈeɪnd ɐ mˈoːɹ tˈɪpɪkli ˌɔːstɹoʊsɪˈæɾɪk stɹˈʌktʃɚ.