diff --git a/package.json b/package.json
index b23a57a..ff512ee 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,8 @@
     "ngx-perfect-scrollbar": "^5.3.1",
     "rxjs": "^5.5.6",
     "url-join": "^4.0.0",
-    "zone.js": "^0.8.20"
+    "zone.js": "^0.8.20",
+    "angular-l10n": "^4.1.5"
   },
   "devDependencies": {
     "@angular/cli": "1.6.5",
diff --git a/src/app/app-routing.module.ts b/src/app/app-routing.module.ts
index d5eeaeb..44f2b82 100644
--- a/src/app/app-routing.module.ts
+++ b/src/app/app-routing.module.ts
@@ -1,5 +1,5 @@
 import { NgModule } from '@angular/core';
-import { Routes, RouterModule } from '@angular/router';
+import { Routes, RouterModule, PreloadAllModules } from '@angular/router';
 
 const routes: Routes = [
   { path: '', loadChildren: './pages/pages.module#PagesModule' },
@@ -9,7 +9,7 @@ const routes: Routes = [
 ];
 
 @NgModule({
-  imports: [RouterModule.forRoot(routes, {useHash: true})],
+  imports: [RouterModule.forRoot(routes, {useHash: true, preloadingStrategy: PreloadAllModules})],
   exports: [RouterModule],
 })
 export class AppRoutingModule { }
diff --git a/src/app/app.module.ts b/src/app/app.module.ts
index 222015d..36b526b 100644
--- a/src/app/app.module.ts
+++ b/src/app/app.module.ts
@@ -1,6 +1,6 @@
-import { NgModule } from '@angular/core';
+import { NgModule, APP_INITIALIZER } from '@angular/core';
 
-import { BrowserModule } from '@angular/platform-browser';
+import { BrowserModule, Title } from '@angular/platform-browser';
 import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
 
 import { HttpClientModule } from '@angular/common/http';
@@ -16,6 +16,40 @@ import { environment } from '../environments/environment';
 import { RESTService } from 'packages/commons/service/rest.service';
 import { RPCService } from 'packages/commons/service/rpc.service';
 
+import {
+  L10nConfig,
+  L10nLoader,
+  LocalizationModule,
+  LocaleValidationModule,
+  StorageStrategy,
+  ProviderType
+} from 'angular-l10n';
+
+const l10nConfig: L10nConfig = {
+  locale: {
+      languages: [
+          { code: 'en', dir: 'ltr' },
+          { code: 'kr', dir: 'ltr' },
+      ],
+      defaultLocale: { languageCode: 'en', countryCode: 'US' },
+      storage: StorageStrategy.Cookie,
+      cookieExpiration: 30
+  },
+  translation: {
+      providers: [
+          { type: ProviderType.Static, prefix: './assets/translations/of-' }
+      ],
+      caching: true,
+      composedKeySeparator: '.',
+      missingValue: 'No key',
+      i18nPlural: true
+  }
+};
+
+export function initL10n(l10nLoader: L10nLoader): Function {
+  return () => l10nLoader.load();
+}
+
 @NgModule({
   declarations: [
     AppComponent,
@@ -28,11 +62,20 @@ import { RPCService } from 'packages/commons/service/rpc.service';
     MaterialModule,
     CovalentModule,
     HttpClientModule,
+    LocalizationModule.forRoot(l10nConfig),
+    LocaleValidationModule.forRoot()
   ],
   providers: [
     {provide: 'REST_BASE_URL', useValue: environment.restBaseURL},
     {provide: 'RPC_BASE_URL', useValue: environment.rpcBaseURL},
     RESTService, RPCService,
+    Title,
+    {
+      provide: APP_INITIALIZER,
+      useFactory: initL10n,
+      deps: [L10nLoader],
+      multi: true
+    }
   ],
   bootstrap: [AppComponent]
 })
diff --git a/src/app/commons/component/header/header.component.html b/src/app/commons/component/header/header.component.html
index 61ff353..3d6e05b 100644
--- a/src/app/commons/component/header/header.component.html
+++ b/src/app/commons/component/header/header.component.html
@@ -8,5 +8,16 @@
     <span class="spacer"></span>
 
     <of-notification [notifications]="toolbarHelpers?.notifications"></of-notification>
-    
+    <div class="menu-section">
+        <button mat-icon-button [matMenuTriggerFor]="countryMenu" aria-label="Open x-positioned menu">
+            <mat-icon>translate</mat-icon>
+        </button>
+        <mat-menu xPosition="before" #countryMenu="matMenu" class="before">
+            <a *ngFor="let item of countryMenuItems" (click)="selectLocale(item.language, item.country, item.currency, item.numberingSystem);"
+                mat-menu-item>
+                {{ item.text }}
+                <mat-icon *ngIf="currentCountry == item.country && currentNumberingSystem == item.numberingSystem">done</mat-icon>
+            </a>
+        </mat-menu>
+    </div>
 </mat-toolbar>
\ No newline at end of file
diff --git a/src/app/commons/component/header/header.component.ts b/src/app/commons/component/header/header.component.ts
index 9c8ed57..96c43c4 100644
--- a/src/app/commons/component/header/header.component.ts
+++ b/src/app/commons/component/header/header.component.ts
@@ -1,12 +1,23 @@
-import { Component, OnInit, Input } from '@angular/core';
+import { Component, OnInit, Input, OnDestroy } from '@angular/core';
 import { ToolbarHelpers } from './toolbar.helpers';
+import { Title } from '@angular/platform-browser';
+import { Direction } from '@angular/cdk/bidi';
+
+import { ISubscription } from 'rxjs/Subscription';
+
+import { LocaleService, TranslationService } from 'angular-l10n';
 
 @Component({
   selector: 'of-header',
   templateUrl: './header.component.html',
   styleUrls: ['./header.component.scss']
 })
-export class HeaderComponent implements OnInit {
+export class HeaderComponent implements OnInit, OnDestroy {
+
+  countryMenuItems: any[] = [
+    { text: 'United States', language: 'en', country: 'US', currency: 'USD', numberingSystem: 'latn' },
+    { text: 'Korea', language: 'kr', country: 'KR', currency: 'KRW', numberingSystem: 'latn' }
+];
 
   @Input() sidenav;
   @Input() sidebar;
@@ -16,9 +27,31 @@ export class HeaderComponent implements OnInit {
   searchOpen = false;
   toolbarHelpers = ToolbarHelpers;
 
-  constructor() { }
+  dir: Direction;
+
+  subscription: ISubscription;
+
+  constructor(public locale: LocaleService, public translation: TranslationService, public title: Title) { }
 
   ngOnInit() {
+    this.subscription = this.translation.translationChanged().subscribe(
+      () => { this.title.setTitle(this.translation.translate('App.Title')); }
+    );
+
+    // Initializes direction.
+    // this.dir = this.getLanguageDirection();
   }
 
+  ngOnDestroy(): void {
+    this.subscription.unsubscribe();
+  }
+
+  // getLanguageDirection(language?: string): Direction {
+  //     return this.locale.getLanguageDirection(language) as Direction;
+  // }
+
+  selectLocale(language: string, country: string, currency: string, numberingSystem: string): void {
+      this.locale.setDefaultLocale(language, country, '', numberingSystem);
+      this.locale.setCurrentCurrency(currency);
+  }
 }
diff --git a/src/app/commons/component/layouts.module.ts b/src/app/commons/component/layouts.module.ts
index 540fbb2..45bed9b 100644
--- a/src/app/commons/component/layouts.module.ts
+++ b/src/app/commons/component/layouts.module.ts
@@ -12,12 +12,30 @@ import { SensorItemFilterComponent } from './sensor-item-filter/sensor-item-filt
 import { HostSummaryCardComponent } from './host-summary-card/host-summary-card.component';
 import { AppSummaryCardComponent } from './app-summary-card/app-summary-card.component';
 
+import {
+  L10nConfig,
+  L10nLoader,
+  LocalizationModule,
+  ProviderType,
+  StorageStrategy
+} from 'angular-l10n';
 
 @NgModule({
   imports: [
     CommonModule,
-    FlexLayoutModule,
+    FlexLayoutModule
   ],
-  declarations: [SidebarComponent, HeaderComponent, FooterComponent, MenuItemComponent, SubMenubarComponent, InfoTableComponent, SensorSummaryComponent, SensorItemFilterComponent, HostSummaryCardComponent, AppSummaryCardComponent]
+  declarations: [
+    SidebarComponent,
+    HeaderComponent,
+    FooterComponent,
+    MenuItemComponent,
+    SubMenubarComponent,
+    InfoTableComponent,
+    SensorSummaryComponent,
+    SensorItemFilterComponent,
+    HostSummaryCardComponent,
+    AppSummaryCardComponent
+  ]
 })
 export class LayoutsModule { }
diff --git a/src/app/commons/component/menu-item/menu-item.component.html b/src/app/commons/component/menu-item/menu-item.component.html
index cb6f9ed..ad0fcb5 100644
--- a/src/app/commons/component/menu-item/menu-item.component.html
+++ b/src/app/commons/component/menu-item/menu-item.component.html
@@ -4,7 +4,7 @@
     
     <mat-icon matListIcon iconsmall  >{{menu.icon}} </mat-icon>
 
-      <h3 matLine *ngIf="!iconOnly">{{ menu.name }} </h3>
+      <h3 matLine *ngIf="!iconOnly" l10nTranslate>{{ menu.name }} </h3>
       <mat-chip-list *ngIf="menu?.chip && !iconOnly">
           <mat-chip >{{menu?.chip?.value}} </mat-chip>
       </mat-chip-list>        
@@ -13,7 +13,7 @@
   </mat-list-item>
   <mat-list-item *ngIf = "menu.link!=false" (click)="menu.open = !menu.open" [routerLink]="[menu.link]">
     <mat-icon matListIcon iconsmall  >{{menu.icon}} </mat-icon>
-      <h3 matLine *ngIf="!iconOnly">{{ menu.name }} </h3>
+      <h3 matLine *ngIf="!iconOnly" l10nTranslate>{{ menu.name }} </h3>
   </mat-list-item>
   <of-menu-item *ngFor="let submenu of menu?.sub" [menu]="submenu" [iconOnly]="iconOnly" [secondaryMenu]="true"> </of-menu-item>
 </mat-nav-list>
diff --git a/src/app/commons/component/menu-item/menu-item.component.ts b/src/app/commons/component/menu-item/menu-item.component.ts
index bde574a..ef94f11 100644
--- a/src/app/commons/component/menu-item/menu-item.component.ts
+++ b/src/app/commons/component/menu-item/menu-item.component.ts
@@ -1,5 +1,7 @@
 import { Component, OnInit, Input } from '@angular/core';
 
+import { Language } from 'angular-l10n';
+
 @Component({
   selector: 'of-menu-item',
   templateUrl: './menu-item.component.html',
@@ -10,6 +12,7 @@ export class MenuItemComponent implements OnInit {
   @Input() menu;
   @Input() iconOnly: boolean;
   @Input() secondaryMenu = false;
+  @Language() lang: string;
 
   constructor() { }
 
diff --git a/src/app/commons/component/sidebar/menu-element.ts b/src/app/commons/component/sidebar/menu-element.ts
index c833539..bf11e2a 100644
--- a/src/app/commons/component/sidebar/menu-element.ts
+++ b/src/app/commons/component/sidebar/menu-element.ts
@@ -1,39 +1,39 @@
 export const menus = [
     {
-        'name': 'Home',
+        'name': 'App.Home',
         'icon': 'home',
         'link': '/home',
         'open': true,
     },
     {
-        'name': 'Infra',
+        'name': 'App.Infra',
         'icon': 'widgets',
         'link': false,
         'open': false,
         'sub': [
             {
-                'name': 'Map',
+                'name': 'App.Map',
                 'link': '/map',
                 'icon': 'indeterminate_check_box',
                 'chip': false,
                 'open': false,
             },
             {
-                'name': 'Sensors',
+                'name': 'App.Sensors',
                 'link': '/sensors',
                 'icon': 'indeterminate_check_box',
                 'chip': false,
                 'open': false,
             },
             {
-                'name': 'SensorSetting',
+                'name': 'App.SensorSetting',
                 'link': '/sensor-setting',
                 'icon': 'indeterminate_check_box',
                 'chip': false,
                 'open': false,
             },
             {
-                'name': 'Probes',
+                'name': 'App.Probes',
                 'link': '/probes',
                 'icon': 'indeterminate_check_box',
                 'chip': false,
@@ -42,20 +42,20 @@ export const menus = [
         ]
     },
     {
-        'name': 'Monitor',
+        'name': 'App.Monitor',
         'icon': 'widgets',
         'link': false,
         'open': false,
         'sub': [
             {
-                'name': 'Overview',
+                'name': 'App.Overview',
                 'link': '/overview',
                 'icon': 'indeterminate_check_box',
                 'chip': false,
                 'open': false,
             },
             {
-                'name': 'Dashboards',
+                'name': 'App.Dashboards',
                 'link': '/dashboard',
                 'icon': 'indeterminate_check_box',
                 'chip': { 'value': 3, 'color': 'accent'},
@@ -64,25 +64,25 @@ export const menus = [
         ]
     },
     {
-        'name': 'Alert',
+        'name': 'App.Alert',
         'icon': 'warning',
         'link': '',
         'open': true,
     },
     {
-        'name': 'Report',
+        'name': 'App.Report',
         'icon': '',
         'link': '',
         'open': true,
     },
     {
-        'name': 'Log',
+        'name': 'App.Log',
         'icon': '',
         'link': '',
         'open': true,
     },
     {
-        'name': 'Setting',
+        'name': 'App.Setting',
         'icon': '',
         'link': '/auth/signin',
         'open': true,
diff --git a/src/app/commons/component/sidebar/sidebar.component.ts b/src/app/commons/component/sidebar/sidebar.component.ts
index 48c616d..0e451e1 100644
--- a/src/app/commons/component/sidebar/sidebar.component.ts
+++ b/src/app/commons/component/sidebar/sidebar.component.ts
@@ -1,5 +1,6 @@
 import { Component, OnInit, Input } from '@angular/core';
 import { menus } from './menu-element';
+import { Language } from 'angular-l10n';
 
 @Component({
   selector: 'of-sidebar',
@@ -7,7 +8,7 @@ import { menus } from './menu-element';
   styleUrls: ['./sidebar.component.scss']
 })
 export class SidebarComponent implements OnInit {
-
+  @Language() lang: string;
   @Input() iconOnly = false;
   public menus = menus;
 
diff --git a/src/app/commons/component/sub-menubar/sub-menubar.component.html b/src/app/commons/component/sub-menubar/sub-menubar.component.html
index 26239db..e4a8449 100644
--- a/src/app/commons/component/sub-menubar/sub-menubar.component.html
+++ b/src/app/commons/component/sub-menubar/sub-menubar.component.html
@@ -1,6 +1,6 @@
 <nav mat-tab-nav-bar>
     <a mat-tab-link *ngFor="let tab of tabs" [routerLink]="tab.path" routerLinkActive #rla="routerLinkActive" [routerLinkActiveOptions]="{exact: true}"
-        [active]="rla.isActive">
+        [active]="rla.isActive" l10nTranslate>
         {{ tab.label }}
     </a>
 </nav>
\ No newline at end of file
diff --git a/src/app/commons/component/sub-menubar/sub-menubar.component.ts b/src/app/commons/component/sub-menubar/sub-menubar.component.ts
index c8a3e0e..43af6f7 100644
--- a/src/app/commons/component/sub-menubar/sub-menubar.component.ts
+++ b/src/app/commons/component/sub-menubar/sub-menubar.component.ts
@@ -1,13 +1,15 @@
 import { Component, OnInit, Input } from '@angular/core';
 import { Router } from '@angular/router';
 
+import { Language } from 'angular-l10n';
+
 @Component({
   selector: 'of-sub-menubar',
   templateUrl: './sub-menubar.component.html',
   styleUrls: ['./sub-menubar.component.scss']
 })
 export class SubMenubarComponent implements OnInit {
-
+  @Language() lang: string;
   @Input() tabs: any;
 
   constructor(public router: Router) { }
diff --git a/src/app/commons/component/sub-menubar/sub-menubar.module.ts b/src/app/commons/component/sub-menubar/sub-menubar.module.ts
index f99c4bc..7d706ff 100644
--- a/src/app/commons/component/sub-menubar/sub-menubar.module.ts
+++ b/src/app/commons/component/sub-menubar/sub-menubar.module.ts
@@ -8,7 +8,7 @@ import { RouterModule } from '@angular/router';
   imports: [
     CommonModule,
     MaterialModule,
-    RouterModule,
+    RouterModule
   ],
   declarations: [
     SubMenubarComponent,
diff --git a/src/app/pages/pages.module.ts b/src/app/pages/pages.module.ts
index a4c3026..b0092a6 100644
--- a/src/app/pages/pages.module.ts
+++ b/src/app/pages/pages.module.ts
@@ -1,4 +1,5 @@
-import { NgModule } from '@angular/core';
+import { NgModule, APP_INITIALIZER} from '@angular/core';
+import { Title } from '@angular/platform-browser';
 import { CommonModule } from '@angular/common';
 import { PagesComponent } from './pages.component';
 import { PagesRoutingModule } from './pages-routing.module';
@@ -15,6 +16,23 @@ import {
 } from 'ngx-perfect-scrollbar';
 import { NotificationModule } from 'packages/notification/notification.module';
 
+import {
+  L10nConfig,
+  L10nLoader,
+  LocalizationModule,
+  ProviderType
+} from 'angular-l10n';
+
+const l10nConfig: L10nConfig = {
+  translation: {
+      providers: [
+          { type: ProviderType.Static, prefix: './assets/translations/of-' }
+      ],
+      composedKeySeparator: '.',
+      missingValue: 'No key'
+  }
+};
+
 const DEFAULT_PERFECT_SCROLLBAR_CONFIG: PerfectScrollbarConfigInterface = {
   suppressScrollX: true
 };
@@ -28,6 +46,7 @@ const DEFAULT_PERFECT_SCROLLBAR_CONFIG: PerfectScrollbarConfigInterface = {
     MaterialModule,
     PerfectScrollbarModule,
     NotificationModule,
+    LocalizationModule.forChild(l10nConfig)
   ],
   declarations: [
     PagesComponent,
@@ -43,4 +62,8 @@ const DEFAULT_PERFECT_SCROLLBAR_CONFIG: PerfectScrollbarConfigInterface = {
     }
   ],
 })
-export class PagesModule { }
+export class PagesModule {
+  constructor(public l10nLoader: L10nLoader) {
+    this.l10nLoader.load();
+  }
+}
diff --git a/src/assets/translations/of-en.json b/src/assets/translations/of-en.json
new file mode 100644
index 0000000..5d9f183
--- /dev/null
+++ b/src/assets/translations/of-en.json
@@ -0,0 +1,17 @@
+{
+    "App": {
+        "Title": "overFlow",
+        "Subtitle": "It's a small world",
+        "Home": "Home",
+        "Map": "Map",
+        "Sensors": "Sensors",
+        "SensorSetting": "SensorSetting",
+        "Probes": "Probes",
+        "Monitor": "Monitor",
+        "Overview": "Overview",
+        "Dashboards": "Dashboards",
+        "Alert": "Alert",
+        "Report": "Report",
+        "Log": "Log"
+    }
+}
diff --git a/src/assets/translations/of-kr.json b/src/assets/translations/of-kr.json
new file mode 100644
index 0000000..2c426cf
--- /dev/null
+++ b/src/assets/translations/of-kr.json
@@ -0,0 +1,18 @@
+{
+    "App": {
+        "Title": "오버플로우",
+        "Subtitle": "It's a small world",
+        "Home": "홈",
+        "Infra": "인프라",
+        "Map": "맵",
+        "Sensors": "센서",
+        "SensorSetting": "센서설정",
+        "Probes": "프로브",
+        "Monitor": "모니터",
+        "Overview": "오버뷰",
+        "Dashboards": "대시보드",
+        "Alert": "알림",
+        "Report": "리포트",
+        "Log": "기록"
+    }
+}
diff --git a/src/index.html b/src/index.html
index ce9b4a0..eb56078 100644
--- a/src/index.html
+++ b/src/index.html
@@ -17,7 +17,7 @@
 </head>
 
 <body>
-  <of-root></of-root>
+  <of-root #root="dir" [dir]="dir" fullscreen></of-root>
 
   <div class="loader-container">
     <div class="spinner">