Locales

A locale is a BCP 47 tag that sets the language of human-readable text, such as the message in an error response. Everything else in a response is the same in every locale.

Supported locales

A locale field in a request, such as the one in user settings, has to be one of these values exactly, with the same case.

Value	Description
ar	Arabic
bg	Bulgarian
cs	Czech
da	Danish
de	German
el	Greek
en-GB	English (United Kingdom)
en-US	English (United States)
es-ES	Spanish (Spain)
es-419	Spanish (Latin America)
fi	Finnish
fr	French
he	Hebrew
hi	Hindi
hr	Croatian
hu	Hungarian
id	Indonesian
it	Italian
ja	Japanese
ko	Korean
lt	Lithuanian
nl	Dutch
no	Norwegian
pl	Polish
pt-BR	Portuguese (Brazil)
ro	Romanian
ru	Russian
sv-SE	Swedish
th	Thai
tr	Turkish
uk	Ukrainian
vi	Vietnamese
zh-CN	Chinese (Simplified)
zh-TW	Chinese (Traditional)

Negotiation

When you're signed in and your account has a saved locale, the API uses it. Otherwise the API picks a locale from the Accept-Language header and uses en-US when the header is missing or nothing in it matches.

The API sorts the Accept-Language tags by q weight and makes two passes over them. Matching ignores case and accepts _ in place of -.

1. The first tag that is a supported locale wins. sv counts as sv-SE, and nb and nn count as no.
2. If no tag matched, the first tag whose language subtag has a locale wins, and fr-CA picks fr. A Chinese tag with Hant, TW, HK or MO picks zh-TW. The language subtags below pick a set locale.

Language subtag	Locale
en	en-US
es	es-ES
pt	pt-BR
zh	zh-CN