Add Vietnamese

Update index.js

Update vi.json

src/locales/en.json

@@ -6,7 +6,8 @@
     },
     "language": {
         "English": "English",
-        "Simplified Chinese": "Simplified Chinese"
+        "Simplified Chinese": "Simplified Chinese",
+        "Vietnamese": "Vietnamese"
     },
     "default": {
         "currency": "USD",

src/locales/index.js

@@ -1,4 +1,5 @@
 import en from './en.json'
+import vi from './vi.json'
 import zhHans from './zh_Hans.json'
 
 export const defaultLanguage = 'en';
@@ -17,5 +18,12 @@ export const allLanguages = {
         alternativeLanguageTag: 'zh-CN',
         aliases: ['zh-CHS', 'zh-CN', 'zh-SG'],
         content: zhHans
+    },
+    'vi': {
+        name: 'Vietnamese',
+        displayName: 'Tiếng Việt',
+        alternativeLanguageTag: 'vi-VN',
+        aliases: ['vi-VN', 'vi'],
+        content: vi
     }
 };

src/locales/zh_Hans.json

@@ -6,7 +6,8 @@
     },
     "language": {
         "English": "英语",
-        "Simplified Chinese": "简体中文"
+        "Simplified Chinese": "简体中文",
+        "Vietnamese": "越南语"
     },
     "default": {
         "currency": "CNY",