diff --git a/frontend/web/src/components/setting/PreferenceSection.tsx b/frontend/web/src/components/setting/PreferenceSection.tsx
index 755425e..16c84ea 100644
--- a/frontend/web/src/components/setting/PreferenceSection.tsx
+++ b/frontend/web/src/components/setting/PreferenceSection.tsx
@@ -28,6 +28,14 @@ const PreferenceSection: React.FC = () => {
       value: "JA",
       label: "日本語",
     },
+    {
+      value: "TR",
+      label: "Türkçe",
+    },
+    {
+      value: "RU",
+      label: "русский",
+    },
   ];
 
   const colorThemeOptions = [
diff --git a/frontend/web/src/i18n.ts b/frontend/web/src/i18n.ts
index c355c1e..d149f0c 100644
--- a/frontend/web/src/i18n.ts
+++ b/frontend/web/src/i18n.ts
@@ -3,6 +3,8 @@ import { initReactI18next } from "react-i18next";
 import en from "../../locales/en.json";
 import fr from "../../locales/fr.json";
 import ja from "../../locales/ja.json";
+import ru from "../../locales/ru.json";
+import tr from "../../locales/tr.json";
 import zh from "../../locales/zh.json";
 
 i18n.use(initReactI18next).init({
@@ -19,6 +21,12 @@ i18n.use(initReactI18next).init({
     JA: {
       translation: ja,
     },
+    RU: {
+      translation: ru,
+    },
+    TR: {
+      translation: tr,
+    },
   },
   lng: "EN",
   fallbackLng: "EN",