diff --git a/dictation_client/src/pages/SignupCompletePage/index.tsx b/dictation_client/src/pages/SignupCompletePage/index.tsx
index 50822c5..9fd2c19 100644
--- a/dictation_client/src/pages/SignupCompletePage/index.tsx
+++ b/dictation_client/src/pages/SignupCompletePage/index.tsx
@@ -1,4 +1,4 @@
-import React from "react";
+import React, { useEffect } from "react";
 import { useTranslation } from "react-i18next";
 import { getTranslationID } from "translation";
 import Header from "components/header";
@@ -7,7 +7,18 @@ import styles from "styles/app.module.scss";
 import emailCheck from "../../assets/images/email_check.svg";
 
 const SignupCompletePage: React.FC = (): JSX.Element => {
-  const [t] = useTranslation();
+  const [t, i18n] = useTranslation();
+
+  useEffect(() => {
+    const language = document.cookie
+      .split(";")
+      .map((x) => x.split("="))
+      .find((x) => x.length === 2 && x[0] === "language");
+
+    if (language) {
+      i18n.changeLanguage(language[1]);
+    }
+  }, [i18n]);
 
   return (
     <div className={styles.wrap}>
diff --git a/dictation_client/src/pages/SignupPage/index.tsx b/dictation_client/src/pages/SignupPage/index.tsx
index 4757cd3..e3a866b 100644
--- a/dictation_client/src/pages/SignupPage/index.tsx
+++ b/dictation_client/src/pages/SignupPage/index.tsx
@@ -1,15 +1,29 @@
 import Footer from "components/footer";
 import Header from "components/header";
 import { selectPageState } from "features/signup/selectors";
-import React from "react";
+import React, { useEffect } from "react";
 import { useSelector } from "react-redux";
 import { Navigate } from "react-router-dom";
+import { useTranslation } from "react-i18next";
 import SignupInput from "./signupInput";
 import SignupConfirm from "./signupConfirm";
 
 const SignupPage: React.FC<{ completeTo: string }> = ({
   completeTo,
 }): JSX.Element => {
+  const { i18n } = useTranslation();
+
+  useEffect(() => {
+    const language = document.cookie
+      .split(";")
+      .map((x) => x.split("="))
+      .find((x) => x.length === 2 && x[0] === "language");
+
+    if (language) {
+      i18n.changeLanguage(language[1]);
+    }
+  }, [i18n]);
+
   const state = useSelector(selectPageState);
 
   return (
diff --git a/dictation_client/src/pages/VerifyAlreadyExistPage/index.tsx b/dictation_client/src/pages/VerifyAlreadyExistPage/index.tsx
index 6da7d1c..08d7cf0 100644
--- a/dictation_client/src/pages/VerifyAlreadyExistPage/index.tsx
+++ b/dictation_client/src/pages/VerifyAlreadyExistPage/index.tsx
@@ -3,10 +3,22 @@ import Header from "components/header";
 import styles from "styles/app.module.scss";
 import { useTranslation } from "react-i18next";
 import { getTranslationID } from "translation";
+import { useEffect } from "react";
 import check_circle from "../../assets/images/check_circle.svg";
 
 const VerifyPage: React.FC = (): JSX.Element => {
-  const [t] = useTranslation();
+  const [t, i18n] = useTranslation();
+
+  useEffect(() => {
+    const language = document.cookie
+      .split(";")
+      .map((x) => x.split("="))
+      .find((x) => x.length === 2 && x[0] === "language");
+
+    if (language) {
+      i18n.changeLanguage(language[1]);
+    }
+  }, [i18n]);
 
   return (
     <div className={styles.wrap}>
diff --git a/dictation_client/src/pages/VerifyFailedPage/index.tsx b/dictation_client/src/pages/VerifyFailedPage/index.tsx
index ddbc089..4d0666d 100644
--- a/dictation_client/src/pages/VerifyFailedPage/index.tsx
+++ b/dictation_client/src/pages/VerifyFailedPage/index.tsx
@@ -7,11 +7,18 @@ import { getTranslationID } from "translation";
 import report from "../../assets/images/report.svg";
 
 const VerifyFailedPage: React.FC = (): JSX.Element => {
-  const [t] = useTranslation();
+  const [t, i18n] = useTranslation();
 
   useEffect(() => {
-    // 初期表示時の処理を記述
-  }, []);
+    const language = document.cookie
+      .split(";")
+      .map((x) => x.split("="))
+      .find((x) => x.length === 2 && x[0] === "language");
+
+    if (language) {
+      i18n.changeLanguage(language[1]);
+    }
+  }, [i18n]);
 
   return (
     <div className={styles.wrap}>
diff --git a/dictation_client/src/pages/VerifySuccessPage/index.tsx b/dictation_client/src/pages/VerifySuccessPage/index.tsx
index 2761ee7..0340934 100644
--- a/dictation_client/src/pages/VerifySuccessPage/index.tsx
+++ b/dictation_client/src/pages/VerifySuccessPage/index.tsx
@@ -3,10 +3,22 @@ import Header from "components/header";
 import styles from "styles/app.module.scss";
 import { useTranslation } from "react-i18next";
 import { getTranslationID } from "translation";
+import { useEffect } from "react";
 import check_circle from "../../assets/images/check_circle.svg";
 
 const VerifySuccessPage: React.FC = (): JSX.Element => {
-  const [t] = useTranslation();
+  const [t, i18n] = useTranslation();
+
+  useEffect(() => {
+    const language = document.cookie
+      .split(";")
+      .map((x) => x.split("="))
+      .find((x) => x.length === 2 && x[0] === "language");
+
+    if (language) {
+      i18n.changeLanguage(language[1]);
+    }
+  }, [i18n]);
 
   return (
     <div className={styles.wrap}>