ɔːlðˈoʊ hɪstˈɔːɹɪkli ʌv sɪwˈɑːnlˈæŋɡwɪdʒ ˈɔːɹɪdʒˌɪn, ˈænsɛstɚz ʌvðə baɪlˈɑːksi ʃˈɛɹd sˈɪmɪlɚ kˈʌltʃɚɹəl fˈiːtʃɚz wɪð ˈʌðɚ pˈiːpəlz ɪnðə sˈaʊθiːst, wˌʌt ˌænθɹəpˈɑːlədʒˌɪsts kˈɔːl ðə sˈaʊθiːstɚn sˌɛɹᵻmˈoʊnɪəl kˈɑːmplɛks sˈɛk.
Although historically of Siouan-language origin, ancestors of the Biloxi shared similar cultural features with other peoples in the Southeast, what anthropologists call the Southeastern Ceremonial Complex (SECC).