Pegon is an Arabic alphabet used to write the Javanese and Sundanese languages, as an alternative to the Roman alphabet or the pre-colonial Javanese script and the old Sundanese script. In particular, it was used for religious (Islamic) writing and poetry from the fifteenth century, particularly in writing commentaries of Quran. The word Pegon originated from a Javanese word pégo which means "deviate", due to the practice of writing Javanese language with Arabic script, which was considered unconventional by Javanese people.