Rocketchat Docker v5.0 - Language setting cannot be set to zh-hk or zh-tw

Description:

Administration → Settings → General If I set Language to 繁體中文(香港) which is zh-hk or 繁體中文(台灣) which is zh-tw and click "save changes" button, I'll get undefined error. So, I can't set language to zh-hk or zh-tw.

Steps to reproduce:

1. Go to **Administration** → **Settings** → **General**
2. Click the dropdown list of Language and set it to 繁體中文(香港) or 繁體中文(台灣)
3. Click "save changes" button

Expected behavior:

It should have been able to set the language to zh-hk or zh-tw.

Actual behavior:

Server Setup Information:

• Version of Rocket.Chat Server: Docker image v5.0
• Operating System: Linux (ubuntu)
• Deployment Method: docker
• Number of Running Instances:
• DB Replicaset Oplog: MongoDB Atlas
• NodeJS Version:
• MongoDB Version: 5.0.10

Client Setup Information

• Desktop App or Browser Version: browser
• Operating System: Windows

Start at Administration → Settings → General and reproduce the save failure with zh-hk and zh-tw in a Docker v5.0 setup. Trace the language-setting save path from the dropdown, then verify that both values can be saved successfully without the undefined error.