artificial language; constructed language; conlang
Refers to languages deliberately created rather than naturally evolved, such as Esperanto, Klingon, or Lojban.
Esperanto is one of the most famous artificial languages.
formal language; markup language; computer language
In computing, refers to languages designed for defining structures, logic, or data, such as XML, HTML, or programming languages.
XMLはデータ構造を記述するための人工言語です。
XML is an artificial language for describing data structures.