Conlang
From The Writerium - the wiki for writers
A constructed language.
A conlang should be more than just a cipher - IE, a system where one word is merely replaced with another with no changes to grammatical structure. Studying real-life languages can help one develop a sense of how different grammatical structures can work.
Common Mistakes
Aside from the aforementioned cipher-not-language, conlangers should also keep in mind that not all languages have the same sounds English does. Spanish has an aspirated H sound and rolled 'rr's. Japanese has no V or Th, and its R sound is quite different from the English R. Beginning writers often have had either no foreign sounds or as many as possible.
Apostrophes, despite being mocked by some, can still serve the purpose of a glottal stop or to show omitted sounds, as in a contraction or nickname. Tossing them in at random is ill-advised, since half the readers will try to pronounce them and become confused and the other half will read the word as if there were no apostrophes anyway.
Discovery of the 'insert symbol' function in Microsoft Word can create a language overflowing with tildes, umlauts, and other accent marks, none of which the would-be conlanger knows how to use.
Finally, when making multiple conlangs, the writer should keep in mind that different languages should sound different. Different sounds and grammar should be in each.
