Format Comparison
XLIFF vs PDF Translation, When to Use Each One
Both workflows produce translated, rebuilt output files. The right choice depends on what your source content looks like and what level of accuracy your workflow requires.
Use XLIFF when…
- Your content exists in an authoring tool that exports XLIFF (FrameMaker, Paligo, MadCap Flare, AEM Guides, Oxygen XML)
- You need inline tags and placeholders preserved exactly
- You want to import the translated result back into your authoring system
- You need the highest accuracy for technical, instructional, or structured content
- Your localization workflow is built around TMS tools based on XLIFF
Use PDF when…
- You only have the finished PDF document and no access to source files
- Your content was never created in an authoring tool that can export XLIFF
- You need a quick translation of a document for internal review or reference
- The document is a scanned or externally supplied PDF
- Layout fidelity is acceptable at a best effort level (complex tables and overlapping graphics may need manual adjustment)
Detailed comparison
| Criterion | XLIFF | |
|---|---|---|
| Translation accuracy | Highest, because structured segments give the AI precise translation units | High, because extraction is structured, but the output is reconstructed from the visual document |
| Inline tag preservation | Full. Tags, placeholders, and variable references are preserved exactly | Not applicable. PDFs do not contain inline tags |
| Output format | Translated ZIP package with the original file hierarchy intact | Rebuilt translated PDF |
| Import back into authoring tool | Yes. Import the translated XLIFF using your tool's standard import process | No. PDF output is for distribution, not for import back into an authoring tool |
| Layout fidelity | Package structure is fully preserved; rendering depends on the target tool | Best effort reconstruction. Complex layouts may need adjustment |
| Source file requirement | Requires an XLIFF export from your authoring tool | Works with any PDF and does not require source files |
| Best for | Technical manuals, product docs, localization workflows | Standalone documents, externally supplied files, quick translations |
The short answer
If your content is in a system that exports XLIFF, use XLIFF. The structured segmentation gives the AI a significant accuracy advantage and the output imports cleanly back into your workflow.
If you only have the finished PDF, use PDF translation. It is the right choice when XLIFF is not an option, and it produces a usable translated document without requiring any source files.