Can not understand the role of each button when using the modifier
Welcome to the community.
WeMod is already available in Chinese.
Instructions on how to change the language are found here: Does WeMod support languages others than English? - WeMod Support.
You’d have found this information quickly if you used the search button in the community or on the support website before posting.
See the link given above, where it explains how to help with Chinese translations.
I participated in the translation, please ask when it will be applied to the modifier