Production EPUB translation and export — 18 October 2026

Source: reading-club-es.epub and source.json. Two chapters, four story paragraphs and two headings. The AI-assisted original story is dedicated to CC0; see provenance.txt.
Workflow: Chrome, https://langbox.site/en/features/bilingual-epub-reading/?analytics=off; target English; displayed model GPT-6 Luna. Uploaded the source file, observed 6 of 6 paragraphs translated, and used both Download bilingual EPUB and Download translation only. Analytics guard confirmed opt-out-cookie and langbox_analytics_off=1.

The downloadable files come from this current production run, not the September archive. Both EPUBs were downloaded through the real buttons. Only internal package identifiers in content.opf and toc.ncx were replaced with public example identifiers. Original and translated text, styles, navigation and chapter structure are unchanged. actual-es-en-2026-10-18.json contains the unedited four translated body paragraphs and both translated headings extracted from the bilingual download.

Verification: parsed all XML; two chapter files; three original/translated pairs per chapter in bilingual output (heading and two body paragraphs); three translated paragraphs per chapter in translation-only output; table-of-contents destinations resolve. Thursday/not Tuesday, twelve kilometres and fifteen minutes remain distinct. No exact processing time or token charge was measured. No independent language review, external reader certification, or full-book benchmark was performed.

SHA-256:
d08bb4365533e8928d2215734d8a5453ff370133b04380d370f1b4131ca6be63  reading-club-actual-bilingual.epub
feb49fc6e505c61d48975c9e678031a4c6a52fc2d3b4b78334836f4ce4f02318  reading-club-actual-translated.epub