From Ebook Friendly:
Recently iBookstore was launched in 26 new countries. But don’t expect that a first thing you’ll see will be books in your own language.
Browsing through iTunes was never easy, but a lack of search by language (both in iTunes and iBooks) is a big mistake and doesn’t help to treat Apple ebookstore as a default reading system by international, non-English users.
If you want to find out how many books in your language are available in your local iBookstore, try one of those two ways described below.
1. Via iTunes & iBooks
In iTunes application on your computer, in a top bar find Books. Click on it and scroll down until you see Bestsellers by Language banner (see picture below).
Be patient, when you click on a banner you probably first see books in English, then in a couple of other languages, like Portuguese or Greek and then maybe you’ll see a section with bestsellers in your mother tongue.
You’ll see only paid books there. If you want to check free titles, go back to a home page, find Free Books banner and, sorry for that, you’ll have to check books manually.
2. Via Google
It’s actually less painful to use Google to search iBookstore.
Link to the rest at Ebook Friendly (the Ebook Friendly website was slow when PG built this link)
Ooof. When it’s easier to use Google to find things in your store than to use the store itself, you have problems.
Perhaps Apple cognoscenti can explain this to Passive Guy, but why is it hard to build a decent search function into a bookstore? Foreign language is an additional step, but others have figured that out.