diff --git a/apps/electron/app/package.json b/apps/electron/app/package.json
index 2dc23cf2..dedfe44f 100644
--- a/apps/electron/app/package.json
+++ b/apps/electron/app/package.json
@@ -1,7 +1,7 @@
 {
   "name": "mediago",
   "version": "3.5.0",
-  "description": "A powerful and easy-to-use online video downloader",
+  "description": "mediago installer",
   "main": "main/index.js",
   "type": "module",
   "author": "caorushizi",
diff --git a/apps/electron/installer/installer.nsh b/apps/electron/installer/installer.nsh
index b1f6cf36..226736db 100644
--- a/apps/electron/installer/installer.nsh
+++ b/apps/electron/installer/installer.nsh
@@ -52,5 +52,5 @@
   ; Trade-off: title bar reads "Setup - mediago-community 3.5.0" in every
   ; locale instead of the translated "Installazione di ..." — acceptable.
   ; ---------------------------------------------------------------------
-  Caption "Setup - ${PRODUCT_NAME} ${VERSION}"
+  BrandingText "${PRODUCT_NAME} ${VERSION}"
 !macroend
diff --git a/apps/ui/src/pages/setting-page/index.tsx b/apps/ui/src/pages/setting-page/index.tsx
index c4661795..bfd42466 100644
--- a/apps/ui/src/pages/setting-page/index.tsx
+++ b/apps/ui/src/pages/setting-page/index.tsx
@@ -250,6 +250,7 @@ const SettingPage: React.FC = () => {
                     { label: t("followSystem"), value: AppLanguage.System },
                     { label: t("chinese"), value: AppLanguage.ZH },
                     { label: t("english"), value: AppLanguage.EN },
+                    { label: t("italian"), value: AppLanguage.IT },
                   ]}
                   placeholder={t("pleaseSelectLanguage")}
                   allowClear={false}
diff --git a/packages/shared/common/src/i18n/config.ts b/packages/shared/common/src/i18n/config.ts
index 60c61589..530f3c2e 100644
--- a/packages/shared/common/src/i18n/config.ts
+++ b/packages/shared/common/src/i18n/config.ts
@@ -7,7 +7,7 @@ export const BASE_I18N_OPTIONS = {
 } as const;
 
 /**
- * Resolve a stored AppStore.language value to a real i18n key ("zh" | "en").
+ * Resolve a stored AppStore.language value to a real i18n key ("zh" | "en" | "it").
  *
  * The persisted language may be `"system"` (meta value meaning "follow OS locale").
  * Each process resolves it at apply-time by passing its own locale source:
@@ -19,8 +19,8 @@ export const BASE_I18N_OPTIONS = {
 export function resolveAppLanguage(
   language: string | undefined,
   systemLocale: string | undefined,
-): "zh" | "en" {
-  if (language === "zh" || language === "en") {
+): "zh" | "en" | "it" {
+  if (language === "zh" || language === "en") || language === "it") {
     return language;
   }
   return (systemLocale ?? "").toLowerCase().startsWith("zh") ? "zh" : "en";
diff --git a/packages/shared/common/src/i18n/resources/index.ts b/packages/shared/common/src/i18n/resources/index.ts
index e54ccd0b..118d37a3 100644
--- a/packages/shared/common/src/i18n/resources/index.ts
+++ b/packages/shared/common/src/i18n/resources/index.ts
@@ -1,13 +1,15 @@
 import { en } from "./en";
 import { zh } from "./zh";
+import { it } from "./it";
 
 export const i18nResources = {
   en,
   zh,
+  it,
 } as const;
 
-export const SUPPORTED_LANGUAGES = ["en", "zh"] as const;
+export const SUPPORTED_LANGUAGES = ["en", "zh", "it"] as const;
 export const DEFAULT_BACKEND_NAMESPACE = "backend" as const;
 export const DEFAULT_FRONTEND_APP = "main" as const;
 
-export { en, zh };
+export { en, zh, it };
diff --git a/packages/shared/common/src/types/index.ts b/packages/shared/common/src/types/index.ts
index 651f4b42..fa0c1b50 100644
--- a/packages/shared/common/src/types/index.ts
+++ b/packages/shared/common/src/types/index.ts
@@ -105,6 +105,7 @@ export enum AppLanguage {
   System = "system",
   ZH = "zh",
   EN = "en",
+  IT = "it",
 }
 
 export interface DownloadContext {