I'm using Calibre (0.8.43) with Amazon Kindle 3. Most of my books have non-English (Cyrillic to be precise) names. When I do "Save to disk", by default Calibre transliterates all names (replaces cyrillic symbols with english equivalents). But It's possible to disable such conversion in preferences.
However, I didn't find such option for sending to device, and when I send my books to my Kindle, Calibre generates weird-named folders and files. Is it possible to turn off conversion for "Send to device" action? Folders like "Tierri Pratchiett" (instead of Russian translation for "Terry Pratchett") makes me sad