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12 changes: 12 additions & 0 deletions utils/getLanguage.ts
Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,18 @@ interface Language {
* @returns locale that linked with correct name
*/
function linkLocale(locale: string) {
// The C locale is the default system locale for POSIX systems.
// https://docs.oracle.com/cd/E36784_01/html/E36823/glmar.html
// https://sourceware.org/glibc/wiki/Proposals/C.UTF-8
// It is common among containerized environments or minimal virtual environments
// though most user-facing systems would have a more specific locale set.
// The problem here is that the C locale is not a valid language tag for the Intl API.
// But it is not desirable to throw an error in this case.
// So we map it to 'en-US'.
if (locale === 'C') {
return 'en-US'
}

let linkedLocale: string
try {
linkedLocale = Intl.getCanonicalLocales(locale)[0]
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