人工语言又称 人造语言，英语：constructed language，亦称conlang，是许多因特定目的、用途，为了某特定使用族群，而人为创造出来的语言，包括文法、单字。人工语言不像自然语言一样会随人类的语言文化而发展，但是，它们在被创造之后，却可能因而产生特定的影响力，随着人类文化如真实语言一样地演进。

人工语言可按创造意图分为：

A planned or constructed language (sometimes called a conlang) is a language whose phonology, grammar, and vocabulary have been consciously devised for human or human-like communication, instead of having developed naturally. It is also referred to as an artificial or invented language. There are many possible reasons to create a constructed language, such as: to ease human communication (see international auxiliary language and code), to give fiction or an associated constructed setting an added layer of realism, for experimentation in the fields of linguistics, cognitive science, and machine learning, for artistic creation, and for language games.