Build a conlang from scratch — the way Tolkien, Marc Okrand, and David J. Peterson do. Foundations (phonology, morphology, syntax, alignment, lexicon, sound change, writing systems), then deep dives into famous conlangs (Quenya, Sindarin, Klingon, High Valyrian, Dothraki, Esperanto, Lojban, Toki Pona, Volapük, Interlingua, Ithkuil), specialized topics (numerals, color terms, kinship, body parts, honorifics, evidentiality, noun classes, classifiers, vowel harmony, tones, clicks, sign-language conlangs, whistled languages, pidgins & creoles), worldbuilding, sociolinguistics, translation challenges, reference grammars, dictionaries, conlang for film & TV & video games, the conlang community (LCS, ConWorkShop, r/conlangs), and a 22-lesson capstone on documenting and sharing your conlang. 57 units, 862 lessons.