Degujak language

Degujak is a constructed language created in 1555. It is also to be one of the oldest constructed langauages. It is spoken by more than 5,361,274 people.

Grammar
Degujak is a subject–verb–object language.

Mongolian script
Mongolian script was used today by more than 5 million people. It is the common script for writing Degujak and decoration purposes.

Greek alphabet
Greek alphabet is used by 204,000 people to write Degujak.

Loanwords
There are 6,400 loanwords, coming from French, Spanish and Greek mostly, sometimes Na'vi or Klingon.