Quote:
Originally Posted by HarryT
The Kobo, like most ePub devices, licenses "Adobe Reader Mobile" software to display ePub books. It's the Adobe software itself that doesn't currently support right-to-left languages.
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True, but as of firmware 2.0.0, Kobo have a second application for reading "Kobo ePubs" or kepubs. These are basically epubs with a couple of Kobo extensions and a different DRM. They are downloaded from the Kobo server to the device or through a Kobo desktop app. The app is either named "ACCESS" or comes from a company of that name. And I believe this app supports epub3.
You can get a sideloaded epub to be opened by this application by using the double extension ".kepub.epub". I believe this application supports Japanese written vertically. If that is the case, it might support RTL languages. In any case, it won't hurt to try.