Unicode CLDR Project

For current CLDR release information, see cldr.unicode.org.

main branch

Status

Update: 2026-03-17

Note: CLDR 49 is in development and not recommended for use at this stage.

What is CLDR?

The Unicode Common Locale Data Repository (CLDR) provides key building blocks for software to support the world's languages, with the largest and most extensive standard repository of locale data available. This data is used by a wide spectrum of companies for their software internationalization and localization, adapting software to the conventions of different languages for such common software tasks.

See for further information:

• CLDR releases and downloads, including the data files and LDML specification associated with each release

• Repository organization, describing the organization of files within this repository

• Building and running CLDR Tools

Contributing

For details about all code or data contributions, see CONTRIBUTING.md

Spotless

A source formatter is now used, please see spotless for details.

Copyright & Licenses

Copyright © 2004-2026 Unicode, Inc. Unicode and the Unicode Logo are registered trademarks of Unicode, Inc. in the United States and other countries.

A CLA is required to contribute to this project - please refer to the CONTRIBUTING.md file (or start a Pull Request) for more information.

The contents of this repository are governed by the Unicode Terms of Use and are released under LICENSE.

Note that some CLDR tools depend on libraries managed via Maven; use of these libraries is governed by separate license agreements.