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+# Language Data
+
+Curated linguistic datasets covering 23,740 languages. Pulls from Glottolog, WALS, PHOIBLE, and Joshua Project, plus original integration work combining them into a single queryable format.
+
+## Datasets
+
+### Core Files
+
+| File | Records | Size | Source | License |
+|------|---------|------|--------|---------|
+| `glottolog_coordinates.json` | 21,329 languoids | 3.8 MB | [Glottolog](https://glottolog.org) | CC-BY-4.0 |
+| `glottolog_languoid.csv` | 23,740 languoids | 1.8 MB | [Glottolog](https://glottolog.org) | CC-BY-4.0 |
+| `phoible.csv` | 105,484 phonemes | 24 MB | [PHOIBLE](https://phoible.org) | CC-BY-SA-3.0 |
+| `wals_languages.csv` | 3,573 languages | 460 KB | [WALS](https://wals.info) | CC-BY-4.0 |
+| `wals_values.csv` | 76,475 feature values | 4.5 MB | [WALS](https://wals.info) | CC-BY-4.0 |
+| `wals_parameters.csv` | 192 typological features | 8 KB | [WALS](https://wals.info) | CC-BY-4.0 |
+| `world_languages_integrated.json` | 7,130 languages | 8.1 MB | Original integration | MIT |
+
+### Subdirectories
+
+**`language-families/`** -- Language family trees, Proto-Indo-European reconstructions, speaker counts. Restructured from Glottolog with enrichment from multiple sources. 10 JSON files covering family hierarchies up to 18 levels deep.
+
+**`historical-corpora/`** -- CLMET historical English corpus metadata.
+
+**`lemmatization/`** -- Historical lemma mappings (738 entries) for normalizing older English texts.
+
+**`reference-corpora/`** -- Brown Corpus part-of-speech statistics.
+
+## The Integrated Dataset
+
+`world_languages_integrated.json` is the main original contribution. It merges four sources by ISO 639-3 code:
+
+- **Glottolog** -- coordinates, family classification, macroarea (7,040 languages)
+- **Joshua Project** -- speaker populations, demographics (7,130 languages)
+- **Language history** -- family tree positions, historical periods (198 languages)
+- **US indigenous** -- endangerment status, revitalization efforts (13 languages)
+
+```python
+import json
+
+with open("world_languages_integrated.json") as f:
+    languages = json.load(f)
+
+# Each record looks like:
+# {
+#   "iso_639_3": "eng",
+#   "name": "English",
+#   "glottolog": { "latitude": 53.0, "longitude": -1.0, "family_name": "Indo-European", ... },
+#   "joshua_project": { "population": 379007140, "countries": [...], ... },
+#   "speaker_count": { "count": 379007140, "source": "joshua_project_aggregated", ... },
+#   "data_sources": ["joshua_project", "glottolog"]
+# }
+
+# Find endangered languages with coordinates
+endangered = [
+    lang for lang in languages
+    if lang.get("glottolog", {}).get("latitude")
+    and lang.get("speaker_count", {}).get("count", float("inf")) < 1000
+]
+```
+
+This dataset is also available separately on HuggingFace as [lukeslp/world-languages](https://huggingface.co/datasets/lukeslp/world-languages).
+
+## What's Not Here
+
+**ISO 639-3 code tables** -- SIL International doesn't allow redistribution. Get them directly from [iso639-3.sil.org](https://iso639-3.sil.org/code_tables/download_tables).
+
+## License
+
+Multiple licenses apply. See [LICENSE.md](LICENSE.md) for details.
+
+- **Our work** (integration, curation, language-families): MIT
+- **Glottolog, WALS**: CC-BY-4.0
+- **PHOIBLE**: CC-BY-SA-3.0 (share-alike)
+
+## Sources
+
+- [Glottolog](https://glottolog.org) -- Max Planck Institute for Evolutionary Anthropology
+- [WALS Online](https://wals.info) -- World Atlas of Language Structures
+- [PHOIBLE](https://phoible.org) -- Phonological inventory database
+- [Joshua Project](https://joshuaproject.net) -- People group demographics
+
+## Author
+
+**Luke Steuber**
+- Website: [lukesteuber.com](https://lukesteuber.com)
+- Bluesky: [@lukesteuber.com](https://bsky.app/profile/lukesteuber.com)