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Locale Codes

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The folder name under src/locales/ is a Discord API key, not a label you choose. Discord validates every localization key at command registration, so an unrecognized folder name fails registration for every command in every language.

The Code Table

Section titled “The Code Table”

DISCORD_LOCALES in src/constants/locales.ts is the accepted set, and LocaleCode is derived from it. Discord adds codes over time, so treat the constant as authoritative and check Discord’s locale reference before assuming a missing code is invalid.

CodeLanguageCodeLanguage
idIndonesianpt-BRPortuguese (Brazil)
daDanishroRomanian
deGermanfiFinnish
en-GBEnglish (United Kingdom)sv-SESwedish
en-USEnglish (United States)viVietnamese
es-ESSpanish (Spain)trTurkish
es-419Spanish (Latin America)csCzech
frFrenchelGreek
hrCroatianbgBulgarian
itItalianruRussian
ltLithuanianukUkrainian
huHungarianhiHindi
nlDutchthThai
noNorwegianzh-CNChinese (Simplified)
plPolishjaJapanese
koKoreanzh-TWChinese (Traditional)

Every target locale in this project is written left to right. None of the eight target locales is right-to-left, so no layout mirroring, bidirectional control, or RTL-specific prose handling is part of a locale addition today. If a future locale needs it, that is a separate change across the panels and the markdown renderer, not a translation task.

Why The Folder Name Is Load-Bearing

Section titled “Why The Folder Name Is Load-Bearing”

commandLoader reads the authored locale set and writes those exact strings into setDescriptionLocalizations() and choice.name_localizations. Nothing maps or validates them on the way out. A folder named pt or zh-Hant is not a near miss to Discord: it is an unknown key, and the registration request is rejected as a whole.

Three consequences worth internalizing:

  • The failure is all-or-nothing. One bad directory name breaks every slash command, not just the one locale.
  • No script catches it. bun run check, bun run check-locales, and the docs build all pass with an invalid locale directory. The only detector is booting the bot and watching registration.
  • initializeLocalizer() skips the directory. An unrecognized name logs an error and is left out of the authored set, so the tree silently does nothing rather than poisoning startup. Skipping is the safety net for a local experiment, not a substitute for using a real code.

Aliases

Section titled “Aliases”

Some Discord keys should reuse another locale’s strings. LOCALE_ALIASES in src/constants/locales.ts maps an alias key to its authored source:

export const LOCALE_ALIASES = {
  "es-ES": "es-419",
} as const satisfies Partial<Record<LocaleCode, LocaleCode>>;

Spanish is authored once, in neutral Latin American register under es-419, and es-ES clients read that same tree. Authoring both would produce two divergent Spanish translations of the same product, which is worse than one register that reads naturally on both sides of the Atlantic.

Two integration points consume the map:

  • localizer() resolves the alias before lookup, so a stored language_pref of es-ES reads the es-419 strings. The same resolution applies to the base-language step, so es-MX also lands on es-419.
  • commandLoader emits the alias key alongside its source in every localizations map, so Discord clients that report es-ES receive Spanish labels.

getSupportedLocales() keeps returning authored directories only, while getRegisterableLocales() returns the Discord-facing expansion. Keep the two uses distinct: an alias is a registration and lookup concept, never a directory.

The docs site mirrors this through DOCS_LOCALE_ALIASES, which is inverted from the same registry so one alias decision covers runtime strings and docs destinations. The product landing page presents explicit language links, so aliases affect generated bot links rather than request routing. See Documentation.

What A New Locale Registers

Section titled “What A New Locale Registers”
  1. src/locales/{code}/ with a name from the table above.
  2. general.language_name as the language’s own name. This is what the language picker shows, so Deutsch rather than German.
  3. Nothing else for registration. Command metadata localizations are emitted automatically from the keys the tree actually authors.

Pickers list the locales in LOCALE_DISPLAY_ORDER, which src/constants/docsLocales.ts derives from the order of the DOCS_LOCALES rows themselves. Moving a row there reorders the docs language switcher, the README switcher row, and the bot’s own picker together, so a new locale is placed by inserting its row where it should read rather than by editing three lists. Placement is a product decision, not an alphabetization.

The same picker is reachable on its own as /personal language, which shows the Language modal with no panel behind it. Its submit carries the language-only-submit route because the panel’s own submit ends by repainting a message a slash command has not created.

The language picker in /personal config > Profile > General is a String Select with a 25-option ceiling (checkDiscordLimits.ts MAX_SELECT_OPTIONS). Ten authored locales fit comfortably. A twenty-sixth locale needs a paginated picker before it can be offered.

Do not add a DEFAULT_BOTNAME_{CODE} family to .env.optional.example. Locale files own localized defaults: general.defaults.bot_name and general.defaults.base_trigger_words are the primary source, and the environment variable is only a generic fallback for a locale that authors neither.

Section titled “Related Docs”