TreeSource is Canada's national database on wood and tree quality, including properties of economically important species.
The World Atlas of Language Structures
WALS is a database of structural features of languages, including phonological, grammatical, and lexical properties.
About The World Atlas of Language Structures
The World Atlas of Language Structures (WALS) Online is a database of structural properties of languages, covering phonological, grammatical, and lexical features gathered from descriptive materials such as reference grammars by 55 authors.
Users can browse features by chapter, search for languages and references, and view citation information and export options for individual features. The content is published under a Creative Commons Licence, requires Javascript to use, and is a finished project that will no longer be updated.
Key features
- Browse phonological, grammatical, and lexical language features by chapter
- Search and browse languages in the database
- Search references used for language descriptions
- View citation information for individual features
- Use export options for feature data
Best for: Linguistics researchers and students working with comparative structural language data.
Good for
- Compiled from descriptive materials by 55 authors
- Content published under a Creative Commons Licence
- Provides export options and chapter-level citation guidance
Watch out for
- Finished project that will no longer be updated
- Requires a browser with Javascript enabled
The World Atlas of Language Structures at a glance
- Website
- wals.info
- Category
- Research & Data › Open Data & Datasets
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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The World Atlas of Language Structures FAQ
How should WALS Online be cited?
Cite the specific chapter used, not only the general work, unless citing data from more than 25 chapters simultaneously, and include the particular version as listed on Zenodo.
Is WALS Online still updated?
No. WALS is a finished project and the website will no longer be updated.
Under what licence is the website content published?
The content is published under a Creative Commons Licence.
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Tell us and an editor will check it.
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