Foreword
Unity has provided official editor of Chinese Language Pack
Unity official Chinese document: Select the Chinese language in the official help documentation
Download method
Method 1: Download Unity Hub
Windows: https://public-cdn.cloud.unity3d.com/hub/prod/UnityHubSetup.exe
Mac: https://public-cdn.cloud.unity3d.com/hub/prod/UnityHubSetup.dmg
Method Two: download other people to share files zh-cn.po
Setting method
The language pack files ( zh-cn.po ) placed in the installation directory of Unity:
C: \ Program Files \ Unity \ 2018.4.9f1 \ Editor \ Data \ Localization
Without this directory, their new one, pay attention to the file named zh-cn.poRestart Unity
Select Chinese language under the Languages - the Editor - Preferences
For properties section, hover stopped at the top there will be Chinese translation