Hi, Achla

You would first need to update CLM from Installation Manager and add Chinese(Simplified and/or Traditional Chinese)
to install language pack(you would need to add install repository to installation manager so that Update can go ahead)

Then you can change browser locale to Chinese(simplified or traditional), It depends on what you want to see in your project area and work item, Those head menus could changed to Chinese but if your project area was created with English locale(browser), some menus will not convert to Chinese even though you set browser to Chinese), So if you want to have a complete Chinese base project area, you need to set browser locale to Chinese and create a new project area from there.
If you update Enumeration value to Chinese, I believe source code will update literals value to Chinese.