(linguistics) A language which is reconstructed by examining similarities in existing languages to try to deduce what a common ancestor language, no longer known, would have been like.

(linguistics, translation studies) The language from which a translation is done. / (computing) The language of the source code to be compiled.

Profanity.

Words that represent concepts rather than physical things

plural of computer language

(computing) Any programming language that consists (mostly) of a series of commands, typically assigning values to objects; a procedural language.

Language in any of a number of different modalities such as speech, sign or writing.

Language considered inappropriate for use during a parliamentary session; especially profanity or suggestions of dishonesty.

(slang) Text written in an incomprehensible script, especially Japanese, Chinese, Arabic or Hindi.

(retronym, linguistics) Any human language that has evolved naturally in a community, usually in contrast to computer programming languages, to controlled natural languages, and to constructed languages such as Esperanto (although constructed languages are subject to change by natural forces among fluent speakers).