1. Upload zone for PDF, DOCX, and TXT files up to 50 pages, with language auto-detection. 2. Language pair picker with 100 plus target languages. 3. Cost and page estimate shown before the job runs, so users are never surprised. 4. Translation engine that processes documents in chunks, keeping paragraph order intact. 5. Side-by-side viewer: original on the left, translation on the right, synced by paragraph. 6. Custom glossary where brand names, product names, and fixed phrases are locked so they never get translated. 7. Tone options: neutral, formal business, or casual. 8. Confidence flags: passages the model marked as low quality get a review badge and a regenerate button. 9. Translation memory that saves approved sentences and reuses them for consistent future documents. 10. Export back to DOCX and plain text, plus a shareable read-only link.