diff --git a/example-ssr/src/components/App.tsx b/example-ssr/src/components/App.tsx
index 1934442d..b97d34b6 100644
--- a/example-ssr/src/components/App.tsx
+++ b/example-ssr/src/components/App.tsx
@@ -1,5 +1,5 @@
-import React from "react"
-import { Link, Stack } from "../../../src"
+import React from "react";
+import { Link, Stack } from "../../../src";
 
 export function App() {
   const crossedTransitions = ({
@@ -8,28 +8,30 @@ export function App() {
     unmountPreviousPage,
   }): Promise<void> => {
     return new Promise(async (resolve) => {
-      const $current = currentPage?.$element
-      if ($current) $current.style.visibility = "hidden"
+      const $current = currentPage?.$element;
+      if ($current) $current.style.visibility = "hidden";
       if (previousPage) {
-        previousPage.playOut()
+        previousPage.playOut();
       }
       if (currentPage) {
-        await currentPage.isReadyPromise()
-        if ($current) $current.style.visibility = "visible"
-        await currentPage.playIn()
-        unmountPreviousPage()
+        await currentPage.isReadyPromise();
+        if ($current) $current.style.visibility = "visible";
+        await currentPage.playIn();
+        unmountPreviousPage();
       }
-      resolve()
-    })
-  }
+      resolve();
+    });
+  };
 
   return (
     <div className={"App"}>
       <nav>
-        <Link to="/">Home</Link> | <Link to="/about">About</Link> |{" "} | <Link to="/article/my-article-1">Article 1</Link> |{" "}
-        <Link to="/contact">Contact</Link>
+        <Link to={{ name: "Home" }}>Home</Link> |{" "}
+        <Link to={{ name: "About" }}>About</Link> |{" "}
+        <Link to={{ name: "Article", params: { slug: "article-1" } }}>Article 1</Link> |{" "}
+        <Link to={{ name: "Contact" }}>Contact</Link>
       </nav>
-        <Stack manageTransitions={crossedTransitions} />
+      <Stack manageTransitions={crossedTransitions} />
     </div>
-  )
+  );
 }
diff --git a/example-ssr/src/index-server.tsx b/example-ssr/src/index-server.tsx
index f8b1efd5..1d0e5853 100644
--- a/example-ssr/src/index-server.tsx
+++ b/example-ssr/src/index-server.tsx
@@ -1,22 +1,29 @@
+import "isomorphic-unfetch";
 import * as React from "react";
 import ReactDOMServer from "react-dom/server";
 import { routes } from "./routes";
 import { App } from "./components/App";
-import { Router, TRoute } from "../../src";
+import { LangService, Router, TRoute } from "../../src";
 import { getNotFoundRoute, getRouteFromUrl } from "../../src/core/matcher";
 import { formatRoutes } from "../../src/core/helpers";
 import { GlobalDataContext } from "./GlobalDataContext";
-import 'isomorphic-unfetch';
+import languages from "./languages";
 
 export async function render(url) {
   /**
    * 1. savoir quel composant je dois rendre dans mon router
    */
+  const langService = new LangService({
+    staticLocation: url,
+    languages,
+  });
+
   const matchingRoute = getRouteFromUrl({
     pUrl: url,
     pBase: "/",
-    pRoutes: formatRoutes(routes),
+    pRoutes: formatRoutes(routes, null, langService),
   });
+
   const notFoundRoute = getNotFoundRoute(routes);
   if (!matchingRoute && !notFoundRoute) {
     console.error("matchingRoute not found & 'notFoundRoute' not found, return.");
@@ -52,7 +59,12 @@ export async function render(url) {
    */
   return {
     renderToString: ReactDOMServer.renderToString(
-      <Router routes={routes} staticLocation={url} initialStaticProps={SSR_STATIC_PROPS}>
+      <Router
+        routes={routes}
+        staticLocation={url}
+        initialStaticProps={SSR_STATIC_PROPS}
+        langService={langService}
+      >
         {/* Provide Global data */}
         <GlobalDataContext.Provider value={{ globalData: GLOBAL_DATA }}>
           <App />
diff --git a/example-ssr/src/index.tsx b/example-ssr/src/index.tsx
index 0e954011..043f9daa 100644
--- a/example-ssr/src/index.tsx
+++ b/example-ssr/src/index.tsx
@@ -4,8 +4,13 @@ import { App } from "./components/App";
 import { routes } from "./routes";
 import { createBrowserHistory } from "history";
 import "./index.css";
-import { Router } from "../../src";
+import { LangService, Router } from "../../src";
 import { GlobalDataContext } from "./GlobalDataContext";
+import languages from "./languages";
+
+const langService = new LangService({
+  languages,
+});
 
 /**
  * Client side
@@ -16,6 +21,7 @@ const root = hydrateRoot(
     routes={routes}
     history={createBrowserHistory()}
     initialStaticProps={window["__SSR_STATIC_PROPS__"]}
+    langService={langService}
   >
     <GlobalDataContext.Provider value={{ globalData: window["__GLOBAL_DATA__"] }}>
       <App />
diff --git a/example-ssr/src/languages.ts b/example-ssr/src/languages.ts
new file mode 100644
index 00000000..dbec6395
--- /dev/null
+++ b/example-ssr/src/languages.ts
@@ -0,0 +1 @@
+export default [{ key: "fr" }, { key: "en" }]
diff --git a/example-ssr/src/pages/HomePage.tsx b/example-ssr/src/pages/HomePage.tsx
index 9cf79af9..3f781730 100644
--- a/example-ssr/src/pages/HomePage.tsx
+++ b/example-ssr/src/pages/HomePage.tsx
@@ -1,16 +1,13 @@
-import React, {useState, useRef, useEffect, useContext} from "react"
-import { useStack } from "../../../src"
-import { transitionsHelper } from "../helpers/transitionsHelper"
-import {GlobalDataContext} from "../GlobalDataContext";
+import React, { useState, useRef, useEffect, useContext } from "react";
+import { useStack } from "../../../src";
+import { transitionsHelper } from "../helpers/transitionsHelper";
+import { GlobalDataContext } from "../GlobalDataContext";
 
-const componentName = "HomePage"
+const componentName = "HomePage";
 function HomePage(props, handleRef) {
-  const rootRef = useRef(null)
-  const [n, setN] = useState(0)
-    const {globalData} = useContext(GlobalDataContext)
-
-    console.log('HOME props ', props)
-    console.log("Global data", globalData)
+  const rootRef = useRef(null);
+  const [n, setN] = useState(0);
+  const { globalData } = useContext(GlobalDataContext);
 
   useStack({
     componentName,
@@ -18,7 +15,7 @@ function HomePage(props, handleRef) {
     rootRef,
     playIn: () => transitionsHelper(rootRef.current, true, { x: -50 }, { x: 0 }),
     playOut: () => transitionsHelper(rootRef.current, false, { x: -0 }, { x: 50 }),
-  })
+  });
 
   return (
     <div className={componentName} ref={rootRef}>
@@ -28,9 +25,11 @@ function HomePage(props, handleRef) {
       HOME HOME HOME HOME HOME HOME HOME HOME HOME HOME HOME HOME HOME HOME HOME HOME HOME
       <br />
       <button onClick={() => setN(n + 1)}>+ {n}</button>
-        {globalData.users.map((user,i) => <p key={i}>{user.name}</p>)}
+      {globalData.users.map((user, i) => (
+        <p key={i}>{user.name}</p>
+      ))}
     </div>
-  )
+  );
 }
 
-export default React.forwardRef(HomePage)
+export default React.forwardRef(HomePage);
diff --git a/src/components/Router.tsx b/src/components/Router.tsx
index 4400117c..e48f5c7f 100644
--- a/src/components/Router.tsx
+++ b/src/components/Router.tsx
@@ -2,7 +2,7 @@ import debug from "@wbe/debug";
 import { BrowserHistory, HashHistory, MemoryHistory } from "history";
 import { Match } from "path-to-regexp";
 import React from "react";
-import { formatRoutes } from "../core/helpers";
+import { formatRoutes, isSSR } from "../core/helpers";
 import { getNotFoundRoute, getRouteFromUrl } from "../core/matcher";
 import { Routers } from "../core/Routers";
 import LangService from "../core/LangService";
@@ -125,10 +125,18 @@ function Router(props: {
    *  const { routes } = useRouter();
    *  return current Router instance routes list, not all routes given to the first instance.
    */
-  const routes = React.useMemo(
-    () => formatRoutes(props.routes, props.middlewares, langService, props.id),
-    [props.routes, langService, props.middlewares, props.id]
-  );
+  const routes = React.useMemo(() => {
+    const routesList = formatRoutes(
+      props.routes,
+      props.middlewares,
+      langService,
+      props.id
+    );
+
+    // if is first instance, register result in Routers
+    if (!Routers.routes) Routers.routes = routesList;
+    return routesList;
+  }, [props.routes, langService, props.middlewares, props.id]);
 
   /**
    * 2. base
@@ -252,7 +260,7 @@ function Router(props: {
 
     // if no newRoute, do not continue
     if (!newRoute) return;
-    
+
     if (props.initialStaticProps) {
       const cache = staticPropsCache();
 
@@ -262,10 +270,13 @@ function Router(props: {
       // first route visited (server & client)
       const isFirstRouteVisited = newRoute.name === props.initialStaticProps.name;
 
+      // In SSR context, we have to manage getStaticProps route properties from server and client
       if (isFirstRouteVisited) {
-        Object.assign(newRoute.props, props.initialStaticProps.props);
+        if (newRoute.props) {
+          Object.assign(newRoute.props, props.initialStaticProps?.props ?? {});
+        }
         if (!dataFromCache) {
-          cache.set(newRoute.fullUrl, props.initialStaticProps.props);
+          cache.set(newRoute.fullUrl, props.initialStaticProps?.props ?? {});
         }
       }
       // if NOT first route (client)
diff --git a/src/core/LangService.ts b/src/core/LangService.ts
index 8654a332..f7a4f229 100644
--- a/src/core/LangService.ts
+++ b/src/core/LangService.ts
@@ -1,13 +1,14 @@
-import { Routers } from "../core/Routers";
+import { Routers } from "./Routers";
 import {
   compileUrl,
   createUrl,
   joinPaths,
   removeLastCharFromString,
-} from "../core/helpers";
-import debug from "@wbe/debug";
+  getLangPathByLang,
+  isSSR,
+} from "./helpers";
 import { TRoute } from "../components/Router";
-import { getLangPathByLang } from "../core/helpers";
+import debug from "@wbe/debug";
 
 const log = debug(`router:LangService`);
 
@@ -48,20 +49,28 @@ class LangService<TLang = any> {
    */
   public base: string;
 
+  /**
+   * Static Location used for SSR context
+   */
+  public staticLocation: string;
+
   /**
    * Init languages service
    * @param languages
    * @param showDefaultLangInUrl
    * @param base
+   * @param staticLocation
    */
   public constructor({
     languages,
     showDefaultLangInUrl = true,
     base = "/",
+    staticLocation,
   }: {
     languages: TLanguage<TLang>[];
     showDefaultLangInUrl?: boolean;
     base?: string;
+    staticLocation?: string;
   }) {
     if (languages?.length === 0) {
       throw new Error("ERROR, no language is set.");
@@ -69,6 +78,7 @@ class LangService<TLang = any> {
     this.languages = languages;
     // remove extract / at the end, if exist
     this.base = removeLastCharFromString(base, "/", true);
+    this.staticLocation = staticLocation;
     this.defaultLang = this.getDefaultLang(languages);
     this.currentLang = this.getLangFromUrl() || this.defaultLang;
     this.showDefaultLangInUrl = showDefaultLangInUrl;
@@ -232,7 +242,12 @@ class LangService<TLang = any> {
     routes: TRoute[],
     showLangInUrl = this.showLangInUrl()
   ): TRoute[] {
-    if (!this.isInit) return routes;
+    if (routes?.some((el) => !!el.langPath)) {
+      log(
+        "Routes have already been formatted by 'addLangParamToRoutes()', return routes."
+      );
+      return routes;
+    }
 
     /**
      * Add :lang param on path
@@ -308,7 +323,9 @@ class LangService<TLang = any> {
    * Get current language from URL
    * @param pathname
    */
-  protected getLangFromUrl(pathname = window.location.pathname): TLanguage<TLang> {
+  protected getLangFromUrl(
+    pathname = this.staticLocation ?? window.location.pathname
+  ): TLanguage<TLang> {
     let pathnameWithoutBase = pathname.replace(this.base, "/");
     const firstPart = joinPaths([pathnameWithoutBase]).split("/")[1];
 
@@ -335,6 +352,7 @@ class LangService<TLang = any> {
    * @protected
    */
   protected reloadOrRefresh(newUrl: string, forcePageReload = true): void {
+    if (isSSR()) return;
     forcePageReload ? window?.open(newUrl, "_self") : Routers.history.push(newUrl);
   }
 }
diff --git a/src/core/helpers.ts b/src/core/helpers.ts
index 7723e348..c8bbefb2 100644
--- a/src/core/helpers.ts
+++ b/src/core/helpers.ts
@@ -144,7 +144,7 @@ export function getSubRouterRoutes(
  * openRoute push a route in history
  *  the Stack component will render the new route
  * @param args can be string or TOpenRouteParams object
- * @param availablesRoutes
+ * @param history
  */
 export function openRoute(args: string | TOpenRouteParams, history = Routers?.history) {
   const url = typeof args === "string" ? args : createUrl(args);
@@ -169,16 +169,19 @@ export function formatRoutes(
     console.error(id, "props.routes is missing or empty, return.");
     return;
   }
+
   // For each instances
   let routesList = patchMissingRootRoute(routes);
 
-  // Only for first instance
-  if (!Routers.routes) {
+  // subRouter instances shouldn't inquired middlewares and LangService
+  if (middlewares) {
     routesList = applyMiddlewares(routesList, middlewares);
-    if (langService) routesList = langService.addLangParamToRoutes(routesList);
-    Routers.routes = routesList;
   }
-  log(id, "routesList", routesList);
+  // Only for first instance
+  if (langService) {
+    routesList = langService.addLangParamToRoutes(routesList);
+  }
+
   return routesList;
 }
 
@@ -507,3 +510,10 @@ export function removeBaseToUrl(path: string, base: string): string {
   let baseStartIndex = path.indexOf(base);
   return baseStartIndex == 0 ? path.substr(base.length, path.length) : path;
 }
+
+/**
+ * Check if we are in SRR context
+ */
+export function isSSR() {
+  return !(typeof window != "undefined" && window.document);
+}