Lowercase language names.

src/ui_ng/src/app/app.component.ts

@@ -15,6 +15,7 @@ export class AppComponent {
         private translate: TranslateService,
         private cookie: CookieService,
         private session: SessionService) {
+
         translate.addLangs(supportedLangs);
         translate.setDefaultLang(enLang);
 
@@ -22,7 +23,7 @@ export class AppComponent {
         let langSetting = this.cookie.get("harbor-lang");
         if (!langSetting || langSetting.trim() === "") {
             //Use browser lang
-            langSetting = translate.getBrowserCultureLang();
+            langSetting = translate.getBrowserCultureLang().toLowerCase();
         }
 
         let selectedLang = this.isLangMatch(langSetting, supportedLangs) ? langSetting : enLang;

src/ui_ng/src/app/base/navigator/navigator.component.html

@@ -18,8 +18,8 @@
                 <clr-icon shape="caret down"></clr-icon>
             </button>
             <div class="dropdown-menu">
-                <a href="javascript:void(0)" clrDropdownItem (click)='switchLanguage("en-US")' [class.lang-selected]='matchLang("en")'>English</a>
-                <a href="javascript:void(0)" clrDropdownItem (click)='switchLanguage("zh-CN")' [class.lang-selected]='matchLang("zh")'>中文简体</a>
+                <a href="javascript:void(0)" clrDropdownItem (click)='switchLanguage("en-us")' [class.lang-selected]='matchLang("en")'>English</a>
+                <a href="javascript:void(0)" clrDropdownItem (click)='switchLanguage("zh-cn")' [class.lang-selected]='matchLang("zh")'>中文简体</a>
             </div>
         </clr-dropdown>
         <clr-dropdown [clrMenuPosition]="'bottom-right'" class="dropdown" *ngIf="isSessionValid">

src/ui_ng/src/app/base/navigator/navigator.component.ts

@@ -135,7 +135,9 @@ export class NavigatorComponent implements OnInit {
             //TODO:
             console.error('Language ' + lang.trim() + ' is not suppoted');
         }
-        window.location.reload();
+        setTimeout(()=>{
+            window.location.reload();
+        }, 500);
     }
 
     //Handle the home action

src/ui_ng/src/app/shared/shared.const.ts

@@ -1,8 +1,8 @@
-export const supportedLangs = ['en-US', 'zh-CN'];
-export const enLang = "en-US";
+export const supportedLangs = ['en-us', 'zh-cn'];
+export const enLang = "en-us";
 export const languageNames = {
-  "en-US": "English",
-  "zh-CN": "中文简体"
+  "en-us": "English",
+  "zh-cn": "中文简体"
 };
 export const enum AlertType {
   DANGER, WARNING, INFO, SUCCESS