Diachronic conlanging refers to the simulation of language change in a conlang
In both natural languages and constructed languages, language change refers to the natural changes in a language over time as it is used by its speakers. Language change is also referred to as diachrony, and its study is called diachronic analysis.
In conlanging, language change can also be simulated, a process called diachronic conlanging or "doing diachronics". Diachronic conlanging can be useful in fictional stories which cover a long time period, or it can be done purely as a creative activity in itself. Use this tag for questions about the process of simulating change in a conlang, and the language-change tag for natural changes to a conlang.