Common Locale Data Repository

The Common Locale Data Repository (CLDR) is a project of the Unicode Consortium to provide locale data in XML format for use in computer applications. CLDR contains locale-specific information that an operating system will typically provide to applications. CLDR is written in the Locale Data Markup Language (LDML).

CLDR is maintained by a technical committee which includes employees from IBM, Apple, Google, Microsoft, and some government-based organizations. The committee is chaired by John Emmons, of IBM; Mark Davis, of Google, is vice-chair.

Among the types of data that CLDR includes are the following:

• Translations for language names
• Translations for territory and country names
• Translations for currency names, including singular/plural modifications
• Translations for weekday, month, era, period of day, in full and abbreviated forms
• Translations for time zones and example cities (or similar) for time zones
• Translations for calendar fields
• Patterns for formatting/parsing dates or times of day
• Exemplar sets of characters used for writing the language
• Patterns for formatting/parsing numbers
• Rules for language-adapted collation
• Rules for spelling out numbers as words
• Rules for formatting numbers in traditional numeral systems (such as Roman and Armenian numerals)
• Rules for transliteration between scripts, much of it based on BGN/PCGN romanization

The information is currently used in International Components for Unicode, Apple's macOS, LibreOffice, MediaWiki, and IBM's AIX, among other applications and operating systems.

CLDR overlaps somewhat with ISO/IEC 15897 (POSIX locales). POSIX locale information can be derived from CLDR by using some of CLDR's conversion tools.

The CLDR covers 400+ languages.

• Common Locale Data Repository, the informational webpage of the CLDR project
• Locale Data Markup Language