i18n: consider using downloadable fonts for non-latin scripts

[JayPanoz]

iOS doesn’t ship with a lot of CJK, Indic, Hebrew and Arabic fonts, which reduces the typeface selection for publications written in those scripts. CJK fonts are even so huge (usually > 10mb) that iBooks itself is using downloadable fonts.

I didn’t find the dev docs but here’s a stack overflow thread about it and a list of downloadable fonts up to iOS 10 can be found on iOS Font List.

It is my understanding that once the fonts are downloaded and cached, all apps can access and use them.