Understanding Usability Issues of Bidirectional Bilingual Websites
http://www.stcsig.org/usability/newsletter/0710-BDBL.htm

Guren, Leah
Usability Interface
2007

Abstract:

Over the past ten years, there has been an ever-increasing amount of usability recommendations for improving website design. Much of the data has focused on navigation of single-language websites. But few studies have tackled the problems of bilingual sites, and virtually no information has been gathered about usability of bilingual or multilingual sites where the languages are not written in the same direction (for example, English, which is read from left-to-right, and Hebrew, which is read from right-to-left).