tercelté
Tercelté is a term used in speculative geography and linguistics to denote a triadic Celtic cultural zone, and, in some contexts, a constructed language that blends features from three Celtic language groups. The concept is common in worldbuilding and in academic exercises on language contact. The name signals a convergence of Celtic linguistic and cultural streams, drawing on the notion of three distinct Celtic traditions.
Geography and demographics: In fictional treatments, tercelté is described as a belt of coastal plains, river
Language: The tercelté language is depicted as a contact language or creole arising from sustained interaction
Culture and society: Tercelté culture is typically portrayed as maritime and trade-oriented, with bardic performance, craft
Reception and use: In scholarly fiction and hypothetical linguistics, tercelté serves as a thought experiment for