If your PDF is written right-to-left, readers expect the flipbook to feel the same as print: cover on the correct edge, spreads that follow the language, and arrows that match how they swipe.
PDF Flip reads your file the way you exported it. The heavy lifting is in the source PDF: make sure your design tool tagged the document RTL and that page order matches what readers expect. If page order looks wrong in any PDF reader, fix the export first—the flipbook follows the same sequence.
Open the same PDF in a desktop reader and walk the cover, first spread, and last page. If something feels backward there, fix the export first; the flipbook will follow the same sequence.
Flip a few pages on a phone with one hand. Swipe direction should feel natural for that language. If your audience uses both LTR and RTL, consider two editions or a clear cover note so people pick the right link.
Can one flipbook serve both directions? Usually you pick one reading order per publication. Mixing within a single PDF is rare and confusing for readers.
Do I need a special template? Pick the template that fits your content (3D, 2D, binder, slider, reader) the same as any other PDF. Direction comes from the file, not the chrome.