i18n fix missing language support, translation fix

Author: coby2023t

Diff for: arduino-ide-extension/src/node/i18n/arduino-localization-contribution.ts

@@ -23,6 +23,7 @@ export class ArduinoLocalizationContribution
     // ['id'], Does not have Transifex translations, but has a VS Code language pack available on Open VSX.
     ['it'],
     ['ja'],
+    ['zh-tw', 'zh-Hant'],    
     ['ko'],
     ['nl'],
     ['pl'],