Only English?

Scrivener is very popular in South Korea. (Now Korean iPad Appstore Paid app 16th rank of all categories)
But this is very difficult to learn because the app supports only English, and official manual is only in English without photo and screenshot.

I think if a company sells a product somewhere, the compony must provide a detail manual written in the language of where the market is, therefore, I ask LL to provide manuals for iOS version of Korean language with many pictures. If this app support Korean language, it would be better.