Pegon is a modified Arabic script used to write the Javanese, Sundanese, and Madurese languages, as an alternative to the Latin script or the Javanese script and the Old Sundanese script. It was used in a variety of applications, from religion, to diplomacy, to poetry. But today particularly, it is used for religious (Islamic) writing and poetry, particularly in writing commentaries of the Qur'an. Pegon includes letters that are not present in Modern Standard Arabic. Pegon has been studied far less than its Jawi counterpart which is used for Malay, Acehnese and Minangkabau.

Old Sundanese script is a script that developed in West Java in the 14th–18th centuries which was originally used to write Old Sundanese language. The Old Sundanese script is a development of the Pallava script which has reached the stage of modifying its distinctive form as used in lontar texts in the 16th century.