fix: fallback to en if supportedLocalesOf throws

ts/util/i18n/shared.ts

@@ -72,6 +72,7 @@ export function getBrowserLocale() {
   // supportedLocalesOf will throw if the locales has a '_' instead of a '-' in it.
   const userLocaleDashed = browserLocale.replaceAll('_', '-');
 
+  try {
     const matchingLocales = Intl.DateTimeFormat.supportedLocalesOf(userLocaleDashed);
 
     const mappingTo = matchingLocales?.[0] || 'en';
@@ -82,6 +83,15 @@ export function getBrowserLocale() {
     }
 
     return mappingTo;
+  } catch (e) {
+    if (!mappedBrowserLocaleDisplayed) {
+      mappedBrowserLocaleDisplayed = true;
+      i18nLog(
+        `userLocaleDashed: '${userLocaleDashed}' was an invalid locale for supportedLocalesOf(). Falling back to 'en'. Error:${e.message} `
+      );
+    }
+    return 'en';
+  }
 }
 
 export function setInitialLocale(crowdinLocaleArg: CrowdinLocale, dictionary: LocalizerDictionary) {