Is it possible to develop a new file format that supports special languages like Persian? (and other right to left formats).

I've read following content:

  • 1
    Why do you think Persian is special? And of course it is possible to develop a new format, you just slightly change one of the existing ones that support Persian.
    – Anthon
    Jul 3, 2015 at 17:47

2 Answers 2


The epub3 standard offers a couple of new attributes specifically for RTL languages such as Persian and most free ePub3 apps, for example, ADE 4, Azardi, Gitden Reader and iBooks display epub3 RTL books fine.

(There's an Arabic test book at the official epub3 samples website that you can use for testing.)

BTW, if you happen to have a Kindle, you'll need to convert epubs to AZW3 files with Calibre, because the old MOBI format doesn't support RTL languages.


Current formats e.g. ePub and Kindle already support this

They are basically a zip of HTML files. HTML includes pages in Persian etc.

  • The ePub standard certainly supports RTL languages, however, very few eInk readers do. The OP stands a much better chance with ePub3 apps (e.g. iBooks and Gitden Reader), because most ePub3 apps also support RTL languages.
    – user4665
    Jul 4, 2015 at 11:32

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