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--- /dev/null
+# The Langdev Repository
+
+This repository forms a monorepo of linguistic information and data
+pertaining to languages developed by [Lady][] under the cognomen of
+Project Langdev. An overview of these languages follows :—
+
+## Languages of Current Interest
+
+### The Jastu‐Sevensi Languages
+
+**Language code:** `art-x-jsv` (use a more specific code if possible)
+
+#### Preclassical Sevensi
+
+**Language code:** `art-x-xjs`
+
+Preclassical Sevensi is the earliest form of the Sevensi language,
+based upon the words and grammars of Pre–Jastu‐Sevensi (described
+below). Its vocabulary is limited and highly-productive, and its
+grammar is comparatively simple and straightforward. It exists as a
+basis for Classical Sevensi, and is not intended to be a complete and
+usable language in its own right.
+
+#### Classical Sevensi
+
+**Language code:** `art-x-osv`
+
+Classical Sevensi is an early language intended to be fully usable for
+the creation of sophisticated works. Its phonology and grammar, while
+developed from Preclassical Sevensi, are significantly more complex.
+
+#### Modern Sevensi
+
+**Language code:** `art-x-svi`
+
+Modern Sevensi is, to a significant extent, a simplification of
+Classical Sevensi aimed at being easy to learn and use.
+
+## Historical Language Efforts
+
+These languages are considered “noncanonical”, meaning that they are
+not taken to comprise part of the fictional history of Langdev
+languages and should not be attested in new works.
+
+### The “7c” Languages
+
+These languages were developed by [Lady][] while she was in high
+school. Work on these languages had probably begun by 2009 and
+definitely by 2010, and ceased sometime in 2012 in favour of the
+successor Jastugay language. Later, these languages were incorporated
+into the starting lexicon for Pre–Jastu‐Sevensi, which forms the basis
+of Preclassical Sevensi as described above.
+
+The 7c languages share a common feature of being developed iteratively
+from an extremely small starting base. Each iteration was assigned a
+number; for Eho the numbers range from Ⅰ–ⅠⅤ, for Elrex from Ι–ⅤⅠ, and
+for Jastulae from Ι–ⅤⅠⅠⅠ. Project Langdev makes no claims as to whether
+this was a good or practical way to develop a language.
+
+#### Eho
+
+**Language code:** `art-x-eho`
+
+The Eho language had the smallest starting lexicon of the 7c languages,
+with just two words. Only four iterations were completed, at which time
+the final lexis was still only 15 words.
+
+The name “Eho” is derived from “East Hope”, an English exonym for the
+fictional location from which the language was thought to originate.
+The name was only used in supplemental materials; in actual language
+documentation the symbol <i lang="zxx">□</i> was used instead.
+
+#### Elrex
+
+**Language code:** `art-x-lrx`
+
+The Elrex language was highly onomatopœic, with a large number of
+vowels and a lexicon which tended to deal in feelings or emotions. Five
+iterations were completed; the sixth was started but never finished.
+
+The name “Elrex” derives from the pronunciation of “Lrex”, itself an
+abbreviated form of “Lendrex” ⟨< PIE <i lang="ine-x-proto">\*lendʰ</i>
+“land” + <i lang="ine-x-proto">\*h₃rḗǵs</i> “king”⟩, an exonym for the
+fictional location from which the language was thought to originate.
+
+#### Jastulae
+
+**Language code:** `art-x-jtl`
+
+Jastulae is the most advanced of the 7c languages, developed through
+eight full iterations and, in its final form, consisting of a
+substantial lexis and rudimentary grammar. It is the only 7c language
+to have an endonym; the word <i lang="art-x-jtl-0008">jāsto͡olæ</i> in
+Jastulae ⅤⅠⅠⅠ means “speaking people”. Prior to the development of this
+word, the language was known vernacularly by the name <i>Trustian</i>,
+and in documentation by the symbol <i lang="zxx">⊻</i>.
+
+### Jastugay
+
+**Language code:** `art-x-jst`; historically also `x-XX-jt`
+
+Jastugay, natively written <i>Jästugā</i>, was a refinement and
+expansion of Jastulae ⅤⅠⅠⅠ (described above). The boundary between the
+two is somewhat fuzzy; Jastugay is distinguished by having a more
+refined grammatical system even as it shares much of the same
+vocabulary. Work on this language primarily occurred in 2012 and 2013.
+
+Only one text in Jastugay was ever produced: a short snippet of story
+titled <cite lang="art-x-jst">Pə dätzē āʒo dāʒo</cite>. This text
+notably does not line up precisely with the language as documented and
+likely predates several innovations, placing it somewhere on the
+boundary between the Jastulae and Jastugay dialects.
+
+### Pre–Jastu‐Sevensi
+
+**Language code:** `art-x-jsv-0009`
+
+Pre–Jastu‐Sevensi forms the foundation for all of the Jastu‐Sevensi
+languages. It was developed starting in 2015 by refining Jastugay and
+incorporating aspects of the other 7c languages.
+
+The version of this language which is actually “attested” is known as
+Preclassical Sevensi (see above); development on Pre–Jastu‐Sevensi is
+now frozen.
+
+## Rights & Licence
+
+The contents of this repository are marked with [CC0 1.0](./COPYING)
+and released by their author into the public domain.
+
+[Lady]: https://www.ladys.computer/about/#lady