API Access
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API Access
Access dataset files directly from scripts, code, or AI agents.
Each file has a stable URL (r-link) that you can use directly in scripts, apps, or AI agents. These URLs are permanent and safe to hardcode.
Start with these files — they give you everything you need to understand and access the dataset.
- 1. Fetch datapackage.json to inspect schema and resources
- 2. Download data resources listed in datapackage.json
- 3. Read README.md for full context
Data Files
Explore with AIlanguage-codes
| Field | Type | Description |
|---|---|---|
| alpha2 | string | 2 letter alpha-2 code |
| English | string | English name of language |
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- ISO 639-1 two-letter language codes and their English names (184 languages).
- Last updated
- 4 March 2026
- Total rows
- ...
- Format
- CSV
- File size
- 3.24 kB
language-codes-3b2
| Field | Type | Description |
|---|---|---|
| alpha3-b | string | 3 letter alpha-3 bibliographic code |
| alpha2 | string | 2 letter alpha-2 code |
| English | string | English name of language |
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- Languages with both ISO 639-2 bibliographic (three-letter) and ISO 639-1 (two-letter) codes, limited to the 184 languages that have an alpha-2 code.
- Last updated
- 4 March 2026
- Total rows
- ...
- Format
- CSV
- File size
- 4.35 kB
language-codes-full
| Field | Type | Description |
|---|---|---|
| alpha3-b | string | 3 letter alpha-3 bibliographic code |
| alpha3-t | string | 3 letter alpha-3 terminologic code (when given) |
| alpha2 | string | 2 letter alpha-2 code (when given) |
| English | string | English name of language |
| French | string | French name of language |
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- All ISO 639-2 languages with bibliographic and terminologic three-letter codes, optional two-letter alpha-2 code, and English and French names (487 entries).
- Last updated
- 4 March 2026
- Total rows
- ...
- Format
- CSV
- File size
- 20.9 kB
ietf-language-tags
| Field | Type | Format | Description |
|---|---|---|---|
| lang | string | IANA/Unicode language-tag-extension | |
| langType | string | ISO 2 letter alpha-2 language code | |
| territory | string | ISO3166-1-Alpha-2 country code or cldr territory code where 001 is the World and 150 is Europe | |
| revGenDate | date | default | Revision date of the CLDR locale file (YYYY-MM-DD); empty when not specified in the source XML. |
| defs | integer | number of definitions | |
| dftLang | boolean | indicate the default-language, as unicode-cldr | |
| file | string | file-name of the locale descriptor |
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- IETF language tags derived from the Unicode CLDR core.zip (main/ folder at http://www.unicode.org/Public/cldr/latest/core.zip), with language type, territory, revision date, definition count, and default-language flag.
- Last updated
- 4 March 2026
- Total rows
- ...
- Format
- CSV
- File size
- 30.3 kB
About this dataset
Description
Comprehensive language code information, consisting of ISO 639-1, ISO 639-2 and IETF language types.
Data
Data is taken from the Library of Congress as the ISO 639-2 Registration Authority, and from the Unicode Common Locale Data Repository.
data/language-codes.csv
This file contains the 184 languages with ISO 639-1 (alpha 2 / two letter) codes and their English names.
data/language-codes-3b2.csv
This file contains the 184 languages with both ISO 639-2 (alpha 3 / three letter) bibliographic codes and ISO 639-1 codes, and their English names.
data/language-codes-full.csv
This file is more exhaustive.
It contains all languages with ISO 639-2 (alpha 3 / three letter) codes, the respective ISO 639-1 codes (if present), as well as the English and French name of each language.
There are two versions of the three letter codes: bibliographic and terminologic. Each language has a bibliographic code but only a few languages have terminologic codes. Terminologic codes are chosen to be similar to the corresponding ISO 639-1 two letter codes.
Example from Wikipedia:
[…] the German language (Part 1:
de) has two codes in Part 2:ger(T code) anddeu(B code), whereas there is only one code in Part 2,eng, for the English language.
There are four special codes: mul, und, mis, zxx; and a reserved range qaa-qtz.
data/ietf-language-tags.csv
This file lists all IETF language tags sourced from the Unicode CLDR core distribution.
Preparation
This dataset is automatically updated via GitHub Actions, running scripts to gather ietf-language-tags.csv and the various language-codes files.
License
This material is licensed by its maintainers under the Public Domain Dedication and License (PDDL).
Nevertheless, it should be noted that this material is ultimately sourced from the Library of Congress as a Registration Authority for ISO and their licensing policies are somewhat unclear. As this is a short, simple database of facts, there is a strong argument that no rights can subsist in this collection.
However, if you intend to use these data in a public or commercial product, please check the original sources for any specific restrictions.