In prehistoric times, the coastlines of Siixtaguna were home to the so-called Canoe Culture, a shoreline fishing culture that invented large canoes capable of reliable short-distance ocean travel. This culture later expanded south and southeast, eventually moving along the islands of Sumarušuxi and the Ttiruku Arc over to Tuysáfa (which it reached between about -4000 and -3000 YP, forming the third wave of human migration to the eastern continent).
Linguistically, the subcontinent is mostly dominated by languages of the Núalís-Takuña family, although there are also several Isthmus languages and a few language isolates not belonging to any other family, especially in the north. Along the southern coastline, a few Isles languages are also found, most prominently Mûtsipsa'.
|Fáralo||Histuənə||[ˈhis.tuə̯.nə]||← Mûts. Siixtaguna (borrowed)|
|Buruya Nzaysa||Xistuna||[ˈxɪs.tu.na]||← F. Histuənə (borrowed)|
|Ndok Aisô||Hêstuna||[hɛ̈sˈtuː.na]||← F. Histuənə (borrowed)|
|Adāta||Hithuona||[ˈhi.tʰu.o.na]||← F. Histuənə (borrowed)|
|Namɨdu||Hissɨna||[hisˈsɨ.nɐ]||← F. Histuənə|
|Woltu Falla||Hitsūan||[hiˈt͡suː.an]||← F. Histuənə|
|Cəssın||Höstänä||[ˈhœs̪.t̪æ.n̪æ]||← F. Histuənə|
|Æðadĕ||Hjetun||[ˈhje.tʰun]||← Ad. Hithuona|
|Nåmúþ||Hisén||[hiˈsɛ́n]||← Nam. Hissɨna|