(in the context of language revival) Extinct / language.

(linguistics) The phenomenon in which speakers of two or more languages or varieties interact and influence each other.

(philosophy) A set of rules governing how participants respond to utterings. / A game that is based on players’ knowledge of a language or languages, such a fictionary, hangman. etc.

plural of Community language

(software) Synonym of language-agnostic

plural of pattern language

(architecture, design, software) A structured method of describing good design practices within a field of expertise.

(literature, linguistics) An ancient language that has an independent tradition that arose mostly on its own, and has a large and rich body of ancient literature.

(derogatory) Official speech that is evasive or pretentious.

(linguistics) A language revitalisation programme in which children and non-native speakers acquire the endangered language through immersion in special-purpose locations called 'nests'.