Localization Reference
A searchable reference for locales, language codes, country codes, currency codes, timezones, date formats, and number formats — everything you need for i18n and l10n in one place.
i18n and l10n bring together a surprising number of standards that rarely live in the same place. The Localiz(s)ation Reference consolidates everything into one searchable tool — for every major locale you get the full picture in a single card.
What’s included per locale
| Field | Standard | Example |
|---|---|---|
| Locale code | BCP 47 | en-GB |
| Language code (2-letter) | ISO 639-1 | en |
| Language code (3-letter) | ISO 639-2 | eng |
| Country code (2-letter) | ISO 3166-1 alpha-2 | GB |
| Country code (3-letter) | ISO 3166-1 alpha-3 | GBR |
| Country code (numeric) | ISO 3166-1 numeric | 826 |
| Currency code | ISO 4217 | GBP |
| Currency symbol | £ | |
| Primary timezone | IANA tz | Europe/London |
| Date format | DD/MM/YYYY | |
| Number format | 1,234.56 | |
| Week starts | Monday | |
| Text direction | LTR / RTL |
[!TIP] Use the RTL tab to quickly find all right-to-left locales. Search
"euro","monday", or a timezone like"America"to filter across all fields at once.
Localisation Reference
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