Hisui sprachbund

Hisui
Geographic distribution	Eastern Tselmeg, North Tengerina
Languages	Dainic languages Dzenic languages (tangentially) Shoumin languages Ryuviric languages (specially Xongkori)

The Hisui sprachbund or Hisui Sea language area is an ensemble of areal features—similarities in grammar, syntax, vocabulary and phonology—among the languages surrounding the Hisui Sea from both Tselmeg and Tengerina. Several features are found across these languages though not all apply to every single language. The Hisui sprachbund is a prominent example of the sprachbund concept.

The languages around the Hisui sea share their similarities despite belonging to various, entirely separate, language families spoken by different sapient species all-together, due to several waves of migrations across the sea, mostly from Tengerina into Tselmeg, and prolongued contact, most notably between the Core Ryuvir languages and the Shoumin languages, though the Xongkoro languages, through their perpetual isolation from similar languages and contact with Dzenic languages have adapted into the local linguistic ecosystem rather than viceversa, though some Dzenic languages show evidence in recent times of adoption of certain features from Shoumin and Xongoro languages. The greatest evidence for this sprachbund is the great amount of vocabulary shared between certain unrelated languages, sometimes up to 40%, from North Tengerina, with Old Ryuviric being the source of most loanwords into other languages, with other languages of notably greater influence in the area being Huli and Monthran.