How should CSS styles and table of contents navigation be addressed when translating EPUB ebooks?
“Direct extraction and translation of text may result in the loss of ebook chapter navigation and refined layout styles, such as drop caps.”
Root Cause Analysis
Checking NCX/OPF text and navigation
The current process extracts text from the main HTML and some navigation and metadata files. Navigation labels in `toc.ncx` and the book title and other content in `.opf` can be updated. Check navigation links, chapters and references in the target reader. Do not assume navigation is correct merely because title translations were updated.
Checking CSS files and reader display
The current process handles translatable text in EPUB, while external CSS files normally retain their original content. Automatic font family (Font-family) replacement or line height (Line-height) adjustment for Chinese is not guaranteed. Check fonts, line spacing and image layout in the target reader.
Retention of Relative Positioning for Images and Illustrations
By parsing the HTML tag structure, we ensure that illustrations, covers, and captions maintain their relative positions within the translated content flow, preventing the separation of images and text.
Final Solution Summary
Enabling cross-language reading to be as seamless as reading the original is the ideal tool for publishers and literary enthusiasts.