Good update! Translated below with the help of translation engine, and from checking out the new version, this is what I understand (in case it's useful to someone else):
Now sets the language to the system language automatically. The tool tip for the Send Note as Email icon, now reflects the system language instead of showing always in simplified Chinese. Requires Joplin restart if updated from a previous version.
Moves some of the Send Note by Email settings to Show Advanced Settings (allowing user customization of several styles).