diff --git a/manifest.json b/manifest.json
index 8318b50..aff7a37 100644
--- a/manifest.json
+++ b/manifest.json
@@ -11,7 +11,7 @@
       "description": "Toggle the side panel."
     }
   },
-  "version": "1.4.3",
+  "version": "1.4.5",
   "description": "__MSG_extensionDescription__",
   "host_permissions": ["https://promptbear.ai/*", "http://localhost:3003/*"],
   "permissions": ["storage", "windows", "activeTab", "contextMenus", "tabs", "notifications"],
diff --git a/package.json b/package.json
index 4476086..bf167be 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "promptbear-chrome-extension",
-  "version": "1.4.3",
+  "version": "1.4.5",
   "description": "PromptBear - A productivity Chrome extension for managing and inserting text snippets with custom shortcuts",
   "license": "MIT",
   "repository": {
diff --git a/packages/i18n/lib/getMessageFromLocale.ts b/packages/i18n/lib/getMessageFromLocale.ts
index e27539e..9b8a94d 100644
--- a/packages/i18n/lib/getMessageFromLocale.ts
+++ b/packages/i18n/lib/getMessageFromLocale.ts
@@ -3,21 +3,30 @@
  * Do not edit this file directly
  */
 import enMessage from '../locales/en/messages.json';
+import jaMessage from '../locales/ja/messages.json';
 import koMessage from '../locales/ko/messages.json';
+import zh_CNMessage from '../locales/zh_CN/messages.json';
+import zh_TWMessage from '../locales/zh_TW/messages.json';
 
 export function getMessageFromLocale(locale: string) {
   switch (locale) {
     case 'en':
       return enMessage;
+    case 'ja':
+      return jaMessage;
     case 'ko':
       return koMessage;
+    case 'zh_CN':
+      return zh_CNMessage;
+    case 'zh_TW':
+      return zh_TWMessage;
     default:
       throw new Error('Unsupported locale');
   }
 }
 
 export const defaultLocale = (() => {
-  const locales = ['en', 'ko'];
+  const locales = ['en', 'ja', 'ko', 'zh_CN', 'zh_TW'];
   const firstLocale = locales[0];
   const defaultLocale = Intl.DateTimeFormat().resolvedOptions().locale.replace('-', '_');
   if (locales.includes(defaultLocale)) {
diff --git a/packages/i18n/lib/type.ts b/packages/i18n/lib/type.ts
index 6f038c1..69c457c 100644
--- a/packages/i18n/lib/type.ts
+++ b/packages/i18n/lib/type.ts
@@ -3,8 +3,15 @@
  * Do not edit this file directly
  */
 import type enMessage from '../locales/en/messages.json';
+import type jaMessage from '../locales/ja/messages.json';
 import type koMessage from '../locales/ko/messages.json';
+import type zh_CNMessage from '../locales/zh_CN/messages.json';
+import type zh_TWMessage from '../locales/zh_TW/messages.json';
 
-export type MessageKey = keyof typeof enMessage & keyof typeof koMessage;
+export type MessageKey = keyof typeof enMessage &
+  keyof typeof jaMessage &
+  keyof typeof koMessage &
+  keyof typeof zh_CNMessage &
+  keyof typeof zh_TWMessage;
 
-export type DevLocale = 'en' | 'ko';
+export type DevLocale = 'en' | 'ja' | 'ko' | 'zh_CN' | 'zh_TW';
diff --git a/packages/i18n/locales/en/messages.json b/packages/i18n/locales/en/messages.json
index 57d6f9f..3f14518 100644
--- a/packages/i18n/locales/en/messages.json
+++ b/packages/i18n/locales/en/messages.json
@@ -1,11 +1,11 @@
 {
-  "extensionDescription": {
-    "description": "Extension description",
-    "message": "PromptBear is a Chrome extension that helps you manage your prompts and improve your productivity."
-  },
   "extensionName": {
     "description": "Extension name",
-    "message": "PromptBear"
+    "message": "PromptBear: Prompt Manager & Text Expander"
+  },
+  "extensionDescription": {
+    "description": "Extension description",
+    "message": "The best Prompt Management tool and Prompt Library. Save time with AI shortcuts (Text Expander) for ChatGPT, Claude, and Gemini."
   },
   "toggleTheme": {
     "message": "Toggle theme"
diff --git a/packages/i18n/locales/ja/messages.json b/packages/i18n/locales/ja/messages.json
new file mode 100644
index 0000000..c84df56
--- /dev/null
+++ b/packages/i18n/locales/ja/messages.json
@@ -0,0 +1,30 @@
+{
+  "extensionName": {
+    "description": "Extension name",
+    "message": "PromptBear: AIプロンプト管理ツール (Prompt Manager)"
+  },
+  "extensionDescription": {
+    "description": "Extension description",
+    "message": "最高のAIプロンプト管理ツールおよびプロンプトライブラリ。ショートカット機能（テキスト展開）により、ChatGPT、Claude、Geminiでの定型文入力を高速化し、業務効率を大幅に向上させます。"
+  },
+  "toggleTheme": {
+    "message": "テーマ切り替え"
+  },
+  "loading": {
+    "message": "読み込み中..."
+  },
+  "greeting": {
+    "description": "Greeting message",
+    "message": "こんにちは、$NAME$さん",
+    "placeholders": {
+      "name": {
+        "content": "$1",
+        "example": "John Doe"
+      }
+    }
+  },
+  "hello": {
+    "description": "Placeholder example",
+    "message": "こんにちは $1"
+  }
+}
diff --git a/packages/i18n/locales/ko/messages.json b/packages/i18n/locales/ko/messages.json
index fef8a7e..f7d19e4 100644
--- a/packages/i18n/locales/ko/messages.json
+++ b/packages/i18n/locales/ko/messages.json
@@ -1,30 +1,30 @@
 {
-  "extensionDescription": {
-    "description": "Extension description",
-    "message": "React, Typescript, Vite를 사용한 크롬 익스텐션 보일러플레이트입니다."
-  },
   "extensionName": {
     "description": "Extension name",
-    "message": "크롬 익스텐션 보일러플레이트"
+    "message": "PromptBear: AI 프롬프트 관리자 (Prompt Manager)"
+  },
+  "extensionDescription": {
+    "description": "Extension description",
+    "message": "최고의 AI 프롬프트 관리 및 프롬프트 라이브러리 도구입니다. 단축키 기능을 통해 ChatGPT, Claude, Gemini에서 반복되는 프롬프트를 즉시 입력하고 업무 효율을 높이세요."
   },
   "toggleTheme": {
-    "message": "테마 변경"
+    "message": "테마 전환"
   },
   "loading": {
     "message": "로딩 중..."
   },
   "greeting": {
-    "description": "인사 메시지",
-    "message": "안녕하세요, 제 이름은 $NAME$입니다.",
+    "description": "Greeting message",
+    "message": "안녕하세요, $NAME$님",
     "placeholders": {
       "name": {
         "content": "$1",
-        "example": "서종학"
+        "example": "John Doe"
       }
     }
   },
   "hello": {
-    "description": "Placeholder 예시",
-    "message": "안녕 $1"
+    "description": "Placeholder example",
+    "message": "안녕하세요 $1"
   }
 }
diff --git a/packages/i18n/locales/zh_CN/messages.json b/packages/i18n/locales/zh_CN/messages.json
new file mode 100644
index 0000000..46a439b
--- /dev/null
+++ b/packages/i18n/locales/zh_CN/messages.json
@@ -0,0 +1,30 @@
+{
+  "extensionName": {
+    "description": "Extension name",
+    "message": "PromptBear: AI提示词管理工具 (Prompt Manager)"
+  },
+  "extensionDescription": {
+    "description": "Extension description",
+    "message": "AI提示词管理工具与指令库。通过自定义快捷键（Text Expander）快速输入，完美提升 ChatGPT、Claude 与 Gemini 的工作效率。"
+  },
+  "toggleTheme": {
+    "message": "切换主题"
+  },
+  "loading": {
+    "message": "加载中..."
+  },
+  "greeting": {
+    "description": "Greeting message",
+    "message": "您好，$NAME$",
+    "placeholders": {
+      "name": {
+        "content": "$1",
+        "example": "John Doe"
+      }
+    }
+  },
+  "hello": {
+    "description": "Placeholder example",
+    "message": "你好 $1"
+  }
+}
diff --git a/packages/i18n/locales/zh_TW/messages.json b/packages/i18n/locales/zh_TW/messages.json
new file mode 100644
index 0000000..d1c1df6
--- /dev/null
+++ b/packages/i18n/locales/zh_TW/messages.json
@@ -0,0 +1,30 @@
+{
+  "extensionName": {
+    "description": "Extension name",
+    "message": "PromptBear: AI 提示詞管理工具 (Prompt Manager)"
+  },
+  "extensionDescription": {
+    "description": "Extension description",
+    "message": "AI 提示詞管理工具與 Prompt Library。透過自定義快捷鍵 (Text Expander) 快速輸入，完美提升 ChatGPT、Claude 與 Gemini 的工作效率。"
+  },
+  "toggleTheme": {
+    "message": "切換主題"
+  },
+  "loading": {
+    "message": "載入中..."
+  },
+  "greeting": {
+    "description": "Greeting message",
+    "message": "您好，$NAME$",
+    "placeholders": {
+      "name": {
+        "content": "$1",
+        "example": "John Doe"
+      }
+    }
+  },
+  "hello": {
+    "description": "Placeholder example",
+    "message": "你好 $1"
+  }
+}