diff --git a/packages/i18n/src/__tests__/utils.test.ts b/packages/i18n/src/__tests__/utils.test.ts
index 21477224..e3ef657e 100644
--- a/packages/i18n/src/__tests__/utils.test.ts
+++ b/packages/i18n/src/__tests__/utils.test.ts
@@ -1,6 +1,6 @@
 import { describe, it, expect } from 'vitest';
 import { ChromeMessage } from '../build';
-import { applyChromeMessagePlaceholders, getSubstitionCount } from '../utils';
+import { applyChromeMessagePlaceholders, getSubstitutionCount } from '../utils';
 
 describe('Utils', () => {
   describe('applyChromeMessagePlaceholders', () => {
@@ -38,26 +38,26 @@ describe('Utils', () => {
     });
   });
 
-  describe('getSubstitionCount', () => {
+  describe('getSubstitutionCount', () => {
     it('should return the last substution present in the message', () => {
-      expect(getSubstitionCount('I like $1, but I like $2 better')).toBe(2);
+      expect(getSubstitutionCount('I like $1, but I like $2 better')).toBe(2);
     });
 
     it('should return 0 when no substitutions are present', () => {
-      expect(getSubstitionCount('test')).toBe(0);
+      expect(getSubstitutionCount('test')).toBe(0);
     });
 
     it('should ignore escaped dollar signs', () => {
-      expect(getSubstitionCount('buy $1 now for $$2 dollars')).toBe(1);
+      expect(getSubstitutionCount('buy $1 now for $$2 dollars')).toBe(1);
     });
 
     it('should return the highest substitution when skipping numbers', () => {
-      expect(getSubstitionCount('I like $1, but I like $8 better')).toBe(8);
+      expect(getSubstitutionCount('I like $1, but I like $8 better')).toBe(8);
     });
 
     it('should only allow up to 9 substitutions', () => {
-      expect(getSubstitionCount('Hello $9')).toBe(9);
-      expect(getSubstitionCount('Hello $10')).toBe(1);
+      expect(getSubstitutionCount('Hello $9')).toBe(9);
+      expect(getSubstitutionCount('Hello $10')).toBe(1);
     });
   });
 });
diff --git a/packages/i18n/src/build.ts b/packages/i18n/src/build.ts
index 7510c452..7ad7aef8 100644
--- a/packages/i18n/src/build.ts
+++ b/packages/i18n/src/build.ts
@@ -8,7 +8,7 @@
 import { mkdir, readFile, writeFile } from 'node:fs/promises';
 import { parseYAML, parseJSON5, parseTOML } from 'confbox';
 import { dirname, extname } from 'node:path';
-import { applyChromeMessagePlaceholders, getSubstitionCount } from './utils';
+import { applyChromeMessagePlaceholders, getSubstitutionCount } from './utils';
 
 //
 // TYPES
@@ -155,7 +155,7 @@ function _parseMessagesObject(
     case 'number':
     case 'symbol': {
       const message = String(object);
-      const substitutions = getSubstitionCount(message);
+      const substitutions = getSubstitutionCount(message);
       return [
         {
           type: 'simple',
@@ -177,7 +177,7 @@ function _parseMessagesObject(
         );
       if (isPluralMessage(object)) {
         const message = Object.values(object).join('|');
-        const substitutions = getSubstitionCount(message);
+        const substitutions = getSubstitutionCount(message);
         return [
           {
             type: 'plural',
@@ -189,7 +189,7 @@ function _parseMessagesObject(
       }
       if (depth === 1 && isChromeMessage(object)) {
         const message = applyChromeMessagePlaceholders(object);
-        const substitutions = getSubstitionCount(message);
+        const substitutions = getSubstitutionCount(message);
         return [
           {
             type: 'chrome',
diff --git a/packages/i18n/src/utils.ts b/packages/i18n/src/utils.ts
index 905aa1c0..cb9b9634 100644
--- a/packages/i18n/src/utils.ts
+++ b/packages/i18n/src/utils.ts
@@ -11,7 +11,7 @@ export function applyChromeMessagePlaceholders(message: ChromeMessage): string {
   );
 }
 
-export function getSubstitionCount(message: string): number {
+export function getSubstitutionCount(message: string): number {
   return (
     1 +
     Array.from({ length: MAX_SUBSTITUTIONS }).findLastIndex((_, i) =>