Other languages in this project are represented with 2-character codes (seemingly ISO 639-1). Esperanto's representation breaks convention by using a 3-character code (ISO 639-2/3). This MR makes it consistent with the other languages.
Other languages in this project are represented with 2-character codes (seemingly ISO 639-1). Esperanto's representation breaks convention by using a 3-character code (ISO 639-2/3). This MR makes it consistent with the other languages.