There are still these three icons left:
- mapnik (and maybe mapbox) global (earth?)
- postal global (language parsing part)
- country or region (used in the list while country is not requested or available)

for mapnik of course we can simply use the globe I have made for the other two icons. Anyway there is a mapnik logo, see https://mapnik.org/pages/media.html

postal global (language parsing part) - on that item I don't really know what is meant.

country or region: Maybe a Magnifying glass over the globe. Have to play a little bit with that one. Probably I will make suggestions tomorrow.