The language has influences from Dutch and then depending on the region Javanese, Malay, Sundanese and Betawi.
The language is expected to become gradually extinct by the end of the 21st century, due to Indos' shift toward Indonesian in Indonesia and Dutch in the Netherlands.
The main contact mechanisms responsible for the creation of Petjok are lexical re-orientation; selective replication and convergence.
In its overall split between grammar and lexicon, the structure of Petjok is very similar to the Media Lengua spoken in Ecuador by the Quechua people, with the critical difference that the much older language, Pecok, has undergone late system morphemes and syntactic blends.
The most important author that published literary work in this language is the Indo (Eurasian) writer Tjalie Robinson.
Petjo should not be confused with Javindo, a different creole language spoken by Indos in the Dutch East Indies.
With the loss of the generation that lived in the Dutch East Indies era, that language has almost died out, but it become identity for Indo descent.
Petjo speakers will usually omit some sounds or add others in between to get a slightly flexible tongue to pronounce a combination of consonants.