Function getSystemLocaleLanguage

src/utils/intl.ts:84–94

()

let cachedSystemLocaleLanguage: string | undefined | null = null

export function getSystemLocaleLanguage(): string | undefined {
  if (cachedSystemLocaleLanguage === null) {
    try {
      const locale = Intl.DateTimeFormat().resolvedOptions().locale
      cachedSystemLocaleLanguage = new Intl.Locale(locale).language
    } catch {
      cachedSystemLocaleLanguage = undefined
    }
  }
  return cachedSystemLocaleLanguage
}