- runtime/i18n.ts: ICU-lite messages (placeholders as text, Intl.PluralRules plurals with exact
forms, selectordinal, select, number/date/time), fallback chains (pt-BR -> pt -> en, ar-x-fm ->
ar), X and legacy code aliases, RTL by locale, lazy catalogs, live onChange. Apostrophes are
literal except right before { } # or another apostrophe.
- runtime/i18nCheck.ts: rules for contributed catalogs (shape, keys, syntax, placeholder parity,
select options, markup/control characters, lengths). An argument English only uses to choose a
plural form may be dropped; missing plural forms are warnings; meta "allowEmpty" fragments.
- runtime/pluginI18n.ts: api.i18n bound per plugin (register/t/locale/dir/onChange/number/date/
relative/list); the UI kit's own words follow the app's language. pageLang.ts reports the
site's <html lang>. shell/messages.ts: shell-model words.
- waybetter-host i18n.rs: NativeStrings (validated plain text, caps, one-pass {name} fill, page
payload by prefix), system_locales via sys-locale; TabState.lang.
- JSON Schemas for catalogs and translator notes; npm exports waybetter/i18n, /i18n/check,
/i18n/plugin.
