Function detectLanguage

graph-ui/src/lib/i18n.ts:156–161

(acceptLanguage?: string | null, override?: string | null)

export type UiMessages = (typeof messages)[UiLanguage];

export function detectLanguage(acceptLanguage?: string | null, override?: string | null): UiLanguage {
  if (override === "zh" || override === "en") return override;
  if (!acceptLanguage) return "en";
  const normalized = acceptLanguage.toLowerCase();
  return normalized.includes("zh-cn") || normalized.includes("zh") ? "zh" : "en";
}

let cachedLanguage: UiLanguage = "en";
let languageLoaded = false;