SONY PRS-505 Firmware-Update + Customizing - MobileRead Forums. Important for the Russification of my old PRS 505 - after that it now works completely in Russian and with Russian eBooks. And it wasn't that complicated after I found it. The Russian menus only appear after you have gone to the Locale settings once. And don't forget the unicode font so that the menus and books can be displayed at all. And generally convert books to LRF, not to ePub - for incomprehensible reasons, ePub still shows garbage when displaying Russian books. Calibre easily converts to LRF.