diff --git a/.changeset/flat-pets-taste.md b/.changeset/flat-pets-taste.md
new file mode 100644
index 00000000000..458554083be
--- /dev/null
+++ b/.changeset/flat-pets-taste.md
@@ -0,0 +1,5 @@
+---
+'@clerk/localizations': minor
+---
+
+Added en-XA locale to highlight unlocalized strings.
diff --git a/packages/localizations/src/en-XA.ts b/packages/localizations/src/en-XA.ts
new file mode 100644
index 00000000000..24b0b46087b
--- /dev/null
+++ b/packages/localizations/src/en-XA.ts
@@ -0,0 +1,80 @@
+import type { LocalizationResource } from '@clerk/shared/types';
+
+import { enUS } from './en-US';
+
+const pseudoCharacterMap = {
+  a: 'å',
+  b: 'ƀ',
+  c: 'ç',
+  d: 'ð',
+  e: 'é',
+  f: 'ƒ',
+  g: 'ğ',
+  h: 'ħ',
+  i: 'ï',
+  j: 'ĵ',
+  k: 'ķ',
+  l: 'ľ',
+  m: 'ɱ',
+  n: 'ñ',
+  o: 'ø',
+  p: 'þ',
+  q: 'ʠ',
+  r: 'ř',
+  s: 'š',
+  t: 'ŧ',
+  u: 'ü',
+  v: 'ṽ',
+  w: 'ŵ',
+  x: 'ẋ',
+  y: 'ÿ',
+  z: 'ž',
+} as const;
+
+const pseudoCharacterMapWithUppercase = Object.fromEntries(
+  Object.entries(pseudoCharacterMap).flatMap(([source, target]) => [
+    [source, target],
+    [source.toUpperCase(), target.toLocaleUpperCase('en-US')],
+  ]),
+) as Record<string, string>;
+
+const tokenOrLetterPattern = /\{\{[^{}]*\}\}|\{[^{}]*\}|[a-zA-Z]/g;
+
+function pseudoLocalizeString(value: string): string {
+  return value.replace(tokenOrLetterPattern, segment => {
+    if (segment.startsWith('{')) {
+      return segment;
+    }
+
+    return pseudoCharacterMapWithUppercase[segment] ?? segment;
+  });
+}
+
+function pseudoLocalizeValue<T>(value: T): T {
+  if (typeof value === 'string') {
+    return pseudoLocalizeString(value) as T;
+  }
+
+  if (Array.isArray(value)) {
+    return value.map(item => pseudoLocalizeValue(item)) as T;
+  }
+
+  if (value && typeof value === 'object') {
+    const localized: Record<string, unknown> = {};
+
+    for (const [key, nestedValue] of Object.entries(value)) {
+      localized[key] = pseudoLocalizeValue(nestedValue);
+    }
+
+    return localized as T;
+  }
+
+  return value;
+}
+
+const enXAFromEnUS = pseudoLocalizeValue(enUS);
+
+export const enXA: LocalizationResource = {
+  ...enXAFromEnUS,
+  locale: 'en-XA',
+};
diff --git a/packages/localizations/src/index.ts b/packages/localizations/src/index.ts
index e481e142175..30e728afd22 100644
--- a/packages/localizations/src/index.ts
+++ b/packages/localizations/src/index.ts
@@ -9,6 +9,7 @@ export { deDE } from './de-DE';
 export { elGR } from './el-GR';
 export { enUS } from './en-US';
 export { enGB } from './en-GB';
+export { enXA } from './en-XA';
 export { esCR } from './es-CR';
 export { esES } from './es-ES';
 export { esMX } from './es-MX';