Constructed languages (also known as artificial languages, or for a certain subset of these art languages, auxiliary languages, etc.) make a fun little hobby for people with an interest in linguistics, as well as providing a nice touch of realism for constructed worlds, whether for RPGs, novels, or anything else. For good examples, look at the classics like Quenya, Klingon, and Verdurian; while I don't believe my works reach anywhere near that level of expertise, they're nice inspirational places to start. If you're interested in making your own, I'd highly recommend The Language Construction Kit, a very nice primer on doing up your own conlang.
At the moment I have three conlangs in varying states of development; this is likely to change over time. Only one's been named so far: Kilirna, the language I've done the most work on. Kilirna is part of a fairly well-developed setting that I will actually post details about some day; Two is part of the same setting, but the language isn't nearly as detailed. Three, for its part, has a relatively good start at grammar, but the vocabulary construction is waiting on it acquiring a setting to go with.
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