Front: State Management: Add language Slice

front/state/Store.ts

@@ -1,8 +1,10 @@
 import userReducer from '../state/UserSlice';
 import { configureStore } from '@reduxjs/toolkit';
+import languageReducer from './LanguageSlice';
 
 export default configureStore({
 	reducer: {
 		user: userReducer,
+		language: languageReducer
 	},
 })