Profanity.

(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.

Words that represent concepts rather than physical things

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

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

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

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

(computing theory) A set of finite strings (called words) made of symbols (from a finite set of symbols, called an alphabet).

(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).

(linguistics) The ability to comprehend information and understand spoken language (or sign language). It may include understanding of the vocabulary and concepts presented, short-term memory and sequencing information.