Locale Code Picker
Picks a real BCP 47 locale code — language plus region, like fr-CA or zh-TW — a quick way to spot-check internationalisation, formatting or translation-fallback behaviour.
What you'll get
This generator draws from a hand-checked list of 22 entries. Here is a spread of 6 of them, so you can see the style before you generate:
- en-US — English (United States)
- fr-FR — French (France)
- es-MX — Spanish (Mexico)
- nl-NL — Dutch (Netherlands)
- ko-KR — Korean (South Korea)
- ar-SA — Arabic (Saudi Arabia)
A fixed sample of the list, not a live draw — your own results are picked at random from all 22, without repeating until the list runs out. BCP 47 / Unicode CLDR locale identifiers (public standard, well-known codes).. Last reviewed 2026-07-18.
How to use this tool
- Press generate for a locale.
- Generate again for a different one.
Common use cases
- Testing internationalisation/localisation code
- Populating a locale-picker demo
- Documentation examples
Limitations and good to know
- 22 well-known locales out of the hundreds BCP 47 permits — enough to catch common regional formatting differences, not a substitute for testing against your actual supported locale list.
- Only one right-to-left locale is included (ar-SA), which is enough to trigger RTL layout code but not to exercise the full range of RTL and bidirectional text behaviour.
- The code names a locale; it does not apply one. Testing your date, number or currency formatting still means passing the code into that code yourself.
Practical tips
- Test a right-to-left locale as well as left-to-right ones; layout problems only appear there.
- Remember that a locale sets number and date formatting as well as language — a decimal comma breaks a surprising amount of parsing.
Entries are chosen with your browser's cryptographic random number generator, so every entry on the list is equally likely. How Generate Random works.
Frequently asked questions
- Why does en-US format things differently from en-GB if the language is the same?
- Because a locale carries the region as well as the language, and the region is what actually sets date order, decimal separators and currency symbols — en-US writes 3/4/2026 for a date, en-GB writes 4/3/2026 for the same day. Testing with several English locales, not just one, catches formatting bugs a single-locale test misses entirely.