feat/language-translation (back language selection from the header)

src/ui/Layout/index.tsx

 import { App, Avatar, Dropdown } from "antd";
 import classNames from "classnames";
-import React, { useEffect } from "react";
+import React, { useEffect, useState } from "react";
 import { useTranslation } from "react-i18next";
 import {
   type LoaderFunction,
@@ -75,7 +75,6 @@ export const Component = () => {
   const { pathname } = routerLocation;
   const pathnamesHideHeader = ["/waitroom", "/duel", "/side"];
   const { modal } = App.useApp();
-
   const callbackUrl = `${location.origin}/match/`;
   const onLogin = () => location.replace(getSSOSignInUrl(callbackUrl));
   const onLogout = () => {
@@ -110,6 +109,7 @@ export const Component = () => {
           </HeaderBtn>
           <span style={{ flexGrow: 1 }} />
           <span className={styles.profile}>
+          {location.pathname === "/" && <I18NSelector />}
             <Dropdown
               arrow
               menu={{