While I was translating strings alongside the plugin UI, I noticed that a text string "Allow content editors to select multiple values" does not appear in translate.wordpress.org.
This is where I spotted on the UI.
- Add new field group
- Add new field
- Select field type "Select" or "User"
- Scroll down to the last option (just above "Close field")

While I was translating strings alongside the plugin UI, I noticed that a text string "Allow content editors to select multiple values" does not appear in translate.wordpress.org.
This is where I spotted on the UI.