But DE, SE, and ES are the official two-digit ISO 3166 country codes for Germany, Sweden, and Spain, respectively. The ISO 3166 country code for Greece is GR, not ES.
However, el is the official ISO 639 language code for the Greek language (lowercase, not uppercase!). So for some reason, someone decided to use the uppercase Greek language code to denote the country of Greece. (the two-digit ISO 639 language code for Sweden is sv, so it’s not even consistent)
As /u/Successful_[email protected] pointed out, they apparently use the VAT identification number for this image.
StreetView 1
StreetView 2
Okay, da ist das Wetter auch kaum besser …
Mapillary 1
Mapillary 2