If this would the case, Sidwell & Blench suggest that Khasic may have been an early offshoot of Palaungic that had spread westward.
ɪf ðɪs wʊd ðə kˈeɪs, sˈɪdwɛl ænd blˈɛntʃ sədʒˈɛst ðæt kˈɑːzɪk mˌeɪhɐv bˌɪn ɐn ˈɜːli ˈɔfʃuːt ʌv pælˈɔːŋɡɪk ðæt hæd spɹˈɛd wˈɛstwɚd.