add chinese as an option in selection menu, translate command ui

src/locales/zh-hans/command-ui-handler.ts

@@ -1,9 +1,9 @@
 import { SimpleTranslationEntries } from "#app/plugins/i18n";
 
 export const commandUiHandler: SimpleTranslationEntries = {
-    "fight": "Fight",
-    "ball": "Ball",
-    "pokemon": "Pokémon",
-    "run": "Run",
-    "actionMessage": "What will\n{{pokemonName}} do?",
+    "fight": "战斗",
+    "ball": "精靈球",
+    "pokemon": "宝可梦",
+    "run": "逃走",
+    "actionMessage": "{{pokemonName}}要怎么做？",
 } as const;

src/plugins/i18n.ts

@@ -59,7 +59,7 @@ export function initI18n(): void {
   i18next.use(LanguageDetector).init({
     lng: lang,
     fallbackLng: 'en',
-    supportedLngs: ['en', 'es', 'fr', 'it', 'de', 'zh-hans'],
+    supportedLngs: ['en', 'es', 'fr', 'it', 'de', 'zh_hans'],
     debug: true,
     interpolation: {
       escapeValue: false,
@@ -80,7 +80,7 @@ export function initI18n(): void {
       de: {
         ...deConfig
       },
-      zh-hans: {
+      zh_hans: {
         ...zhHansConfig
       }
     },

src/system/settings.ts

@@ -198,6 +198,10 @@ export function setSetting(scene: BattleScene, setting: Setting, value: integer)
                 label: 'German',
                 handler: () => changeLocaleHandler('de')
               },
+              {
+                label: 'Chinese (Simplified)',
+                handler: () => changeLocaleHandler('zh_hans')
+              },
               {
                 label: 'Cancel',
                 handler: () => cancelHandler()