diff --git a/dictation_client/src/App.tsx b/dictation_client/src/App.tsx
index 3468864..25ff190 100644
--- a/dictation_client/src/App.tsx
+++ b/dictation_client/src/App.tsx
@@ -3,7 +3,7 @@ import { BrowserRouter } from "react-router-dom";
 import { PublicClientApplication } from "@azure/msal-browser";
 import { MsalProvider, useMsal } from "@azure/msal-react";
 import { msalConfig } from "common/msalConfig";
-import { useEffect } from "react";
+import { useEffect, useLayoutEffect } from "react";
 import { useDispatch } from "react-redux";
 import globalAxios, { AxiosError, AxiosResponse } from "axios";
 import { clearToken } from "features/auth";
@@ -35,7 +35,8 @@ const App = (): JSX.Element => {
   }, [dispatch, instance]);
 
   // Language読み取り
-  useEffect(() => {
+  // AADB2Cからのリダイレクト後にレンダリングより先に言語切り替えしたいのでuseLayoutEffectを使う
+  useLayoutEffect(() => {
     const language = document.cookie
       .split(";")
       .map((x) => x.split("="))