Multilingual PDFs and Documents: Accessible, SEO-optimized, and Print-ready

Basics of Multilingual PDF Documents

Creating multilingual PDFs poses specific challenges for companies, especially when it comes to manuals, catalogs, or technical documentation. Unlike pure websites, PDFs must be both print-ready and digitally accessible and search-engine optimized. A key principle is the use of actual text markup instead of embedded images. In practice, this means that you should export your content – whether from InDesign, Word, or another source – as searchable and tagged text. Only then can screen readers capture the content and search engines index the documents.

A common mistake is exporting text as paths or using images for headings. This results in text that cannot be read by search engines or output by assistive technologies. Therefore, always use fonts that can be embedded in the PDF and ensure correct language tagging. For each language document, the language must be set in the file tag – ideally already in the source program. Example: A German manual should have the value "de" in the PDF metadata field "Language", a French one "fr". This is relevant not only for screen readers but also for search engines to correctly assign the language version.

Another cornerstone is consistent file naming. Name your PDFs according to a scheme that indicates language and content, e.g., "ProductManual_DE_V2.pdf". Avoid special characters and spaces; use underscores or hyphens instead. This facilitates management in the file system and improves the readability of the URL if the PDF is linked on a website. Store all language versions in a central location and use the same folder structure to simplify updates.

Legal notice: The recommendations mentioned are based on current standards (PDF/UA, WCAG). For binding statements on accessibility and SEO, you should consult a specialist in digital accessibility and legal counsel. Each company bears responsibility for compliance with national and international regulations.

Accessibility Requirements for PDFs

Accessibility in PDFs is not only a legal requirement in many countries (e.g., EU Directive 2019/882, the Accessibility Reinforcement Act), but also a matter of user-friendliness. An accessible PDF allows people with visual impairments, motor limitations, or cognitive disabilities to use the content on an equal basis. The foundation is the PDF/UA format (Universal Accessibility), which ensures that documents are correctly interpreted by screen readers and other assistive devices.

Experience shows that many PDFs already fail due to a missing tag structure. Tags are invisible, hierarchical markers that identify headings, paragraphs, lists, tables, and graphics. Without tags, a PDF is an unstructured text desert for screen readers. Therefore, when exporting from your authoring tool, use the option "Create PDF with tags" (e.g., in Adobe InDesign: "Export as PDF/UA"). Subsequently, check with tools such as the PAC (PDF Accessibility Checker) or the Acrobat Accessibility Checker whether all elements are correctly tagged. Particular attention should be paid to tables: they must be tagged as real tables, not as optically formatted paragraphs.

Another critical point is alternative text for graphics. Diagrams, photos, or icons must be provided with descriptive alt text that conveys the content or function of the graphic. In practice, this is often neglected. Use separate alt texts per language – avoid automatic translations, as these are often inaccurate. The logical reading order (tab order) must also be correct: a screen reader reads the tags in the order they appear in the tag tree, not necessarily in the visual arrangement. A nested layout can cause side content to be read before main content.

Finally, you should perform a manual check: have the PDF read aloud by a screen reader (e.g., NVDA or JAWS) to test the actual user experience. Note that legal requirements vary by country – for a legally binding assessment, consult your legal department or an external advisor. Investments in accessibility typically pay off through a larger target audience and improved user satisfaction.

SEO for PDF Documents: Metadata and Structure

PDFs are indexed by search engines like Google – but only if they send the right signals. To make your multilingual PDF visible in search results, you need to optimize metadata, file structure, and linking. Start with basic metadata: title, author, description, and keywords. In Adobe Acrobat, you can find these under 'File > Properties'. The title should be concise and include the main keyword, e.g., 'Assembly Instructions Heat Pump AlphaPro – German'. The description should be 150–160 characters and reflect the content and language. Avoid keyword stuffing, but use relevant terms naturally.

Text markup within the PDF itself is crucial: headings should be structured with H1, H2 tags, etc. – similar to a website. This hierarchy helps search engines understand the thematic structure. Use separate metadata for each language version; do not simply reuse the original. A common mistake is missing language indication in metadata – be sure to include it so that the search engine correctly assigns the language and delivers the PDF only in the corresponding language region. If you have multiple language versions, set a primary language and link to the other versions – either within the PDF (e.g., as a footnote with hyperlink) or on the website embedding the PDF.

Another SEO factor is file size. Large PDFs (over 10 MB) are empirically read less frequently and may be disadvantaged in indexing. Optimize images and remove unnecessary objects. Use the compression function during export. Linking to the PDF also matters: use descriptive anchor texts like 'Product Catalog 2025 (PDF, 2 MB)' instead of 'click here'. Place these links on relevant subpages of your website. A PDF alone on your domain without internal linking is harder for search engines to find.

Note: Search engines do not treat PDFs like normal web pages. They cannot follow internal links or execute JavaScript. Therefore, ensure all important information is contained within the PDF itself. For a comprehensive SEO strategy, consult an SEO specialist. The mentioned measures improve discoverability, but there is no guarantee of indexing – however, practice shows that structured, tagged PDFs with optimized metadata appear significantly more often in search results.

Text Markup and Reading Order for Screen Readers

An accessible PDF must provide a logical reading order and correct text markup for screen readers. The reading order defines the sequence in which content is read aloud – it must match the visual arrangement and should not be disrupted by layout elements such as columns or text boxes. In Adobe Acrobat Pro, you can correct the reading order via the 'Accessibility' panel: there you can adjust the tag tree, move or reassign tags. Ensure that all text is tagged as 'Text' and not as 'Figure' (for images) or 'Form'. Headings should be marked up with <H1> to <H6>, paragraphs with <P>, lists with <L> and <LI>. Tables require <Table>, <TR>, <TH>, and <TD>.

Correct reading order is especially critical for multi-column layouts or embedded graphics. Check before export whether the tags reflect the logical reading order. Use the 'Show Reading Order' function or a screen reader like NVDA for verification. For localized PDFs, the speech output must be correctly set per section or word. In the tag tree, set the 'Language' attribute to the appropriate language code (e.g., 'de' or 'fr'). Use the 'Properties' menu of the respective tag in Acrobat. Alternatively, define the language in the source file (e.g., InDesign) using language packages, so it is automatically set upon export.

Another important point is alternative text for graphics and decorative elements. Every meaningful image should have a descriptive alternative text. Decorative images should be tagged as 'Background' or given empty alternative text so that the screen reader skips them. Avoid placing text in images; it is invisible to screen readers. Instead, use actual text fields. For diagrams or screenshots, a textual description can be added in the body text. Note that accessibility also includes navigation: bookmarks and document titles facilitate orientation. For a practical check, an automated PDF/UA validator like PAC 2021 helps verify compliance. In practice, manual rework in the tag tree is indispensable to achieve a truly accessible multilingual PDF.

Workflow for Creating Localized PDFs

An efficient workflow for localized PDFs begins with a structured source file. Use a layout program such as Adobe InDesign, Microsoft Word, or an XML-based authoring system. Create consistent formatting templates (paragraph and character styles) that clearly define all text elements like headings, paragraphs, lists, and tables. These templates simplify later translation and export as a tagged PDF. Avoid manual formatting; every text property should be controlled via a template. Export the source file as a tagged PDF (in InDesign: enable "Create Tagged PDF"). This source PDF serves as the basis for translation.

The translation process ideally takes place on the source file, not the PDF. Use CAT tools like Trados Studio or memoQ that work directly with InDesign files or IDML exports. Alternatively, extract the text via XLIFF export and import the translation back. After translation, the layout must be adapted, as target texts are often longer or shorter. In InDesign, this is done using placeholder styles or manual adjustment. Pay attention to correct line breaks, column optimization, and the embedding of graphics that may require separate translations (e.g., diagrams with text). Use anchored objects for recurring elements like headers and footers.

After layout adjustment, export as an accessible PDF. Ensure all tags are preserved and the reading order is correct. Perform a final check with a PDF accessibility checker. For print readiness, additional requirements such as color profile (e.g., PDF/X-4) and embedded fonts must be met. Allocate sufficient time for quality assurance at each step. A tip from practice: automate recurring tasks with InDesign scripts, such as adjusting text frames to translation length. Document the entire workflow so that different stakeholders (translators, layout artists, quality reviewers) can collaborate smoothly.

Tools for translation and layout adaptation

The choice of the right tools significantly impacts efficiency when creating localized PDFs. For translating texts created in layout programs like InDesign or Word, CAT tools (Computer Assisted Translation) have become established. Programs like Trados Studio or memoQ offer interfaces to open InDesign documents (.idml) or Word files directly and extract the segments to be translated. They work with translation memories that store already translated text modules, and terminology databases for consistency. Alternatively, AI-powered translation services are used to deliver raw text; however, this must always be reviewed by a native speaker. For pure text PDFs (not layout-based), tools like SDL Passolo or Alchemy Catalyst are suitable for localizing software interfaces, which can also edit PDF content.

For layout adaptation after translation, Adobe InDesign is the standard tool. It allows the adoption of translated texts via placeholder styles, preserving formatting. With plugins like Wordsflow or EasyCatalog, data from tables or XML sources can be automatically inserted into InDesign templates. For accessibility checking, the free PDF Accessibility Checker (PAC) from the Swiss association "PDF/A Competence Center" is available. It detects tag errors, incorrect reading orders, and missing alternative texts. Commercial alternatives are CommonLook PDF or axe for Adobe Acrobat. Validation with PAC 2021 is a proven intermediate step before delivering the PDF to customers.

In addition to specific tools, consistent file management is important. Save all source files versioned and use a Translation Management System (TMS) to track translation jobs. For print readiness, ensure PDF/X standards (e.g., PDF/X-4) are applied during export and that all fonts are embedded. In practice, it has proven effective to establish a repeatable workflow using the same tools and settings. This minimizes error sources and sustainably ensures the quality of multilingual PDFs. However, when selecting tools, always consider the individual requirements of your project – not every tool fits every workflow.

Integration of translations into existing PDFs

The integration of translations into existing PDFs requires a structured approach to preserve layout, accessibility, and search engine optimization. In practice, a two-stage workflow has proven effective: first, extract the text from the source PDF, ideally with tags and structural information (e.g., using the export function in Adobe Acrobat Pro or a parser tool). Then, the translated text is inserted into the target PDF, preserving the markup (e.g., headings, paragraphs, lists) or manually reworking it.

For the actual insertion, there are several methods. For PDFs from a DTP program (e.g., InDesign), it is efficient to perform the translation directly in the source format and then generate a new PDF. If only the PDF is available, you can work with tools like Adobe Acrobat Pro ('Edit PDF'): replace the original text with the translated text, but pay attention to line breaks and hyphenation. Alternatively, specialized localization tools (e.g., memoQ or SDL Trados) with PDF plug-ins enable tag-based translation. This preserves the structure, and metadata such as title, author, and language must be updated after translation.

A practical tip: Create a separate PDF version for each language and name the file clearly (e.g., 'Manual_DE.pdf', 'Manual_EN.pdf'). In the document properties (Ctrl+D), set the correct language under 'Advanced': this helps screen readers select the correct speech output. Also check whether embedded fonts fully cover the target language (e.g., special characters like 'ß' or umlauts). Missing characters cause display errors – in practice, it is often necessary to replace the font or embed a font with a larger character set.

During integration, ensure consistent text markup: use tags such as H1, H2 for headings, P for paragraphs, and L for lists. This structure helps not only screen readers but also search engines when indexing. After insertion, a manual visual inspection should be performed: Are page breaks correct? Are tables and graphics still in the right position? For complex layouts, it may be necessary to fine-tune the position of text elements. Plan about 30–60 minutes per 100 pages per language for integration, depending on complexity.

Handling Graphics, Tables, and Forms

Graphics, tables, and forms pose special requirements in multilingual PDFs, as they often contain fixed layouts and cannot be automatically translated. For graphics with embedded text (e.g., labeled diagrams), it is recommended to store the text as an alternative description (alt text) or open the graphic in the source program and replace the text elements. In practice, it is effective to translate graphics separately from the main text and insert them as high-resolution versions (300 dpi) for printing. Ensure that the alt text is available in the target language and fully describes the image meaning – this is required for accessibility according to WCAG 2.1.

Tables are particularly tricky, as column widths and row heights vary depending on text length. Translate table content separately first and check whether the translation fits into the existing grid. If not, adjust the table widths or rebuild the table. Use the Table tag with TH for header cells and TD for data cells in the markup; a correct reading order (from top-left to bottom-right) is essential for screen readers. Avoid nested tables as they complicate navigation. For numbers and units (e.g., currencies, measurements), local adaptation should be performed – for example, converting inches to centimeters or specifying euros instead of dollars.

Forms require translation of all labels, placeholders, and error messages. Use Adobe Acrobat Pro's form tools to edit each field individually: double-click the field and change the properties (name, tooltip, description). Ensure that the field order (tab order) corresponds to the logical reading order – this can be set via the 'Pages' → 'Form Fields' section. For interactive forms, it is also necessary to check whether scripts or calculations need to be adapted to the target language (e.g., date formats). After adaptation, create a list of all fields and validate input with test data.

Finally: perform a print check by printing the PDF in the target language. Check that graphics are sharp, tables do not overflow, and form fields are correctly positioned. These steps ensure that the document is both accessible and print-ready.

Accessibility Testing: Test Procedures and Checklists

Accessibility testing should ideally be carried out in several stages, combining both automated and manual methods. A proven testing approach is the before-and-after comparison: check the accessibility of the source PDF and then test it again after translation to ensure no degradation has occurred. Start with the built-in accessibility check in Adobe Acrobat Pro (Accessibility → Full Check). This often detects issues such as missing alt text, incorrect tags, or insufficient contrast. Export the results as a report and address the listed problems.

To supplement automated testing, manual tests with a screen reader such as NVDA (free) or JAWS are recommended. Turn off the screen display and navigate solely using the keyboard: can you jump to all headings? Are tables read out linearly? Is the reading order logical? In practice, automated tools often detect only 70–80% of issues—the rest are only revealed through human interaction. Also check the language setting: the screen reader must be able to select the correct pronunciation for each text section, which is ensured by proper language tagging in the PDF.

A helpful checklist includes the following points: (1) Are all headings tagged with H tags? (2) Does every graphic have meaningful alt text? (3) Are tables tagged with TH and TD? (4) Is the reading order correct in the tag tree? (5) Is the document language set in the metadata? (6) Is the contrast between text and background above 4.5:1? (7) Are form fields labeled? (8) Do links and bookmarks work? (9) Is the PDF title meaningful? (10) Are lists tagged as L tags? This list should be processed for each language version.

Finally, it is advisable to arrange an external check by a service provider or a person experienced in accessibility. Keep in mind that compliance with WCAG 2.1 criteria (at least Level AA) not only meets regulatory requirements but also improves usability for everyone. Document the test results and the corrections made—this is helpful for complaints or audits.

File Naming, Linking, and Findability

Consistent naming of localized PDFs is a cornerstone of their findability in search engines and on your web server. Use a uniform file name for each language version that clearly indicates the target language. A proven scheme is [Product]-[Language Code]-[Version].pdf, for example, "Bedienungsanleitung-XY-de-v2.pdf" for German. Avoid umlauts, spaces, and special characters—use hyphens instead. This ensures the file is reliably interpreted by both browsers and content management systems.

To improve findability in search engines, reference the PDFs in your sitemap by specifying a separate URL for each language version with the corresponding hreflang attribute. Example: <link rel="alternate" hreflang="de" href="https://example.com/product/manual-de.pdf" />. Additionally, on the HTML pages where the PDFs are offered, you can set language-specific links—for instance, as a dropdown menu or language switcher. Make sure the link text contains the language, e.g., "Manual (German)".

For links within the PDF itself, use relative paths if the PDFs are in the same directory, or absolute URLs that point to the respective language version. Particularly for multilingual documents with internal cross-references (e.g., „see Chapter 5“), it is useful to set bookmarks that appear in the left navigation pane of the PDF viewer. These bookmarks must be named in the target language and linked to the corresponding pages.

Practical recommendation: Establish a naming convention for each project and document it. After localization, check whether all internal and external links work—especially for references to other language-specific documents. Use a tool such as Acrobat Pro or a link checker. Avoid copying PDFs directly via "Save As" from another language; instead, create a new file from the original template to avoid metadata conflicts.

Print Optimization: Colors, Resolution, and Bleed Allowances

If localized PDFs are to be not only digital but also printed, you must consider print-relevant parameters early in the translation workflow. This starts with the color space: for printing – especially offset printing – CMYK (Cyan, Magenta, Yellow, Key/Black) is required, while RGB (Red, Green, Blue) suffices for screen display. Convert colors only after translation, as subsequent conversion can cause unexpected color shifts. Experience shows that converting from RGB to CMYK in programs such as Adobe Acrobat Pro or InDesign yields the most stable results.

Image and graphic resolution must be sufficient for printing: 300 dpi (dots per inch) is the standard for high-quality printed materials. Before production, check whether all embedded bitmap images have this resolution – especially if images originate from the source document. For line art (e.g., logos), a higher resolution of 800–1200 dpi may be advisable. Use lossless compression methods such as ZIP or LZW for grayscale and color images to preserve detail.

A common mistake in multilingual PDFs is missing or inconsistent bleed. Since localized text is often longer or shorter, the layout can shift. Therefore, plan for a bleed of at least 3 mm on all sides – this also applies to elements that extend beyond the page edge (e.g., background colors). Ensure that no important content (text, logos) lies within the bleed area. Set up bleed in the source layout and verify after localization that all pages are correctly bled.

Concrete recommendation: Create a print-optimized PDF version for each language separately from the digital version. Use Acrobat Pro's preview function to check color space and resolution. Have a proof print done on the target medium to test color reproduction and registration. Document the printing parameters (paper type, color profile) in a accompanying sheet to be included with the print job.

Quality Assurance: Proofreading and Technical Testing

Quality assurance for multilingual PDFs involves both content-related and technical checks. Begin with proofreading the translated texts by a native-speaking editor. This should check not only linguistic correctness but also cultural appropriateness – for example, phrasing that might be considered impolite in some countries. Ensure consistent terminology within the document and across different language versions. Create a word list with binding translations for technical terms.

Parallel to proofreading, perform technical tests. This includes checking accessibility: ensure that the reading order in the tag tree is correct, that alternative texts for images are present, and that the document language is correctly set in the 'Language' metadata – otherwise screen readers will not function properly. Use the built-in Accessibility Checker in Acrobat Pro (Full Check) or specialized tools such as PAC (PDF Accessibility Checker). Note that an automatic check does not catch all errors; spot-check keyboard navigation.

Another technical aspect is file size: for web upload, PDFs should be compressed without compromising print quality. Use the 'Optimize PDF' option in Acrobat Pro to remove unnecessary data (e.g., duplicate fonts). Test the display on different PDF readers (Adobe Reader, browser-integrated viewers, mobile apps) – some fonts may not render if not embedded. Therefore, fully embed all used fonts (not just subsets).

Finally, we recommend a checklist to be completed for each language version: proofreading, link checking, accessibility test, color space and resolution check, font embedding, and final proof print. Have the final version countersigned by two independent people. This systematic approach reduces the risk of errors in delivery, even if time-consuming. Note that legal requirements for accessibility (e.g., EU Directive 2019/882) must be considered in quality assurance – seek separate legal advice on this.

Integration into Content Management Systems and PIM

Seamlessly integrating localized PDFs into your Content Management System (CMS) or Product Information Management (PIM) is crucial for an efficient workflow. Instead of managing PDFs manually, generate them directly from your CMS. Modern systems like WordPress, Drupal, or Adobe Experience Manager support creating PDF documents from structured content—such as articles, product data, or manual modules. This significantly reduces translation effort, as only the source data needs to be translated, not the PDF layouts.

Use your PIM as a central source for multilingual product data. Manage texts, images, and metadata in all languages there. A PIM like Akeneo or Pimcore can automatically generate PDFs when needed, relying on templates and translations. Ensure that metadata (title, description, keywords) is maintained separately per language—this improves search engine discoverability. Also, set clear permissions: only authorized editors should be able to publish or translate PDFs.

For practical implementation, we recommend automating PDF generation as part of the publishing workflow. Define triggers: as soon as a product is released in a new language, the system automatically creates the localized PDF version. This can then be stored in a dedicated directory whose path contains the language code (e.g., /pdf/de/ or /pdf/en/). Link these PDFs in the CMS to the corresponding product pages—ideally via a link that dynamically references the language version. This ensures customers always download the correct version.

Also pay attention to versioning: translations change, so old PDFs should be archived or overwritten, with a change history being useful. Test the integration before going live: check that all metadata is correctly adopted, accessibility is maintained, and links work. For complex layouts, it may be necessary to couple PDF generation with a tool like InDesign Server or PrinceXML. The effort is worthwhile: once set up correctly, you save time and avoid inconsistencies between web content and PDF documents.

Automation Possibilities and Future Developments

The automation of multilingual PDF creation is steadily advancing. Already today, you can integrate translations using AI services (e.g., DeepL API) into your workflow: raw translations are automatically generated and then quality-assured by a human reviewer. Combine this with a PIM or CMS that generates PDFs at the push of a button—resulting in a nearly fully automated process. It is important to note that the quality of AI translation depends on the text type; technical manuals generally yield better results than culturally specific marketing content.

Another automation step is the use of CI/CD pipelines (Continuous Integration/Continuous Deployment). When source data changes—for example, a product description—a script can trigger translation, perform accessibility checks, and generate the PDF in multiple languages. This pipeline can be implemented in tools like GitLab CI or Jenkins. Ensure that such scripts also automatically populate metadata (e.g., XMP data) to support SEO. For accessibility, libraries like Apache PDFBox are already available to set tags and reading order.

Future developments aim for even more dynamic PDFs. While many PDFs today are static printouts of web pages, you could soon create 'smart' PDFs that adapt to the user—for example, via collapsible buttons for language or target audience. Real-time translation via browser plugins is also discussed, but is often problematic from a data protection perspective. For companies with high documentation volumes, it is worth looking into 'Digital Publishing' platforms that work XML-based and thus generate PDF, HTML, and eBook from a single source.

Finally, we recommend introducing automation step by step. Start with a pilot project for a single manual, test the quality of translations and accessibility. Document the error sources and adjust accordingly. Full automation is a worthwhile goal, but requires investments in infrastructure and training. Seek advice from experienced system integrators to avoid pitfalls such as faulty layouts or incomplete metadata. With a solid foundation, you can manage your multilingual PDFs more efficiently while maintaining quality.

Common Pitfalls in Multilingual PDFs and How to Avoid Them

When creating multilingual PDFs, typical errors often occur that impair accessibility, findability, or print quality. One of the most common pitfalls is the lack of language markup. If the language of a document or individual text passages is not correctly stored in the metadata or tag tree, screen readers do not recognize the language and may read the content with the wrong phonetics. Therefore, check after translation whether the “Language” attribute is set in the document catalog and in the tags for each language version.

Another problem is incomplete transfer of the reading order. When you export a PDF from a layout program and subsequently insert translations, the arrangement of text blocks often shifts. The resulting incorrect tag order causes screen readers to read content in a meaningless sequence. Therefore, use the tag structure check in Adobe Acrobat or a specialized tool after each change and manually correct the order.

Embedding fonts also frequently causes difficulties. Translated texts may require characters that are not included in the originally used font (e.g., diacritical marks for Eastern European languages). If the correct font is missing or not fully embedded, the text is displayed incorrectly in the PDF or screen readers cannot read it. When exporting, ensure that all used fonts are marked as “embedded” or ”subset.”

Color profiles and resolution are another typical annoyance. If you create PDFs for different printers or countries, differing color profiles (e.g., FOGRA vs. SWOP) can lead to unwanted color shifts. Define a uniform color profile for each language version and test the print output with a soft proof.

Last but not least, metadata maintenance is often neglected. Each language version requires its own metadata (title, author, keywords) in the target language; otherwise, duplicated content or incorrect language markup appears in search engines. A consistent workflow with centralized metadata management helps avoid these errors.

Practical Example: Step by Step to Accessible, Multilingual PDF Production

Assume you need to create a business report for a company in German and English that is accessible, search engine optimized, and print-ready. Proceed as follows:

Step 1: Source preparation. Create the source document (e.g., InDesign or Word) with clean formatting templates that structure headings, paragraphs, and lists. Define a separate template for each language or use layers. Provide alternative texts for all graphics.

Step 2: Translation. Hand over the texts to a professional translator familiar with the requirements of accessible PDFs. Request that formatting templates be retained and ask for notes if texts become longer or shorter—this affects the layout.

Step 3: Layout adjustment. Adjust the layout per language by enlarging text boxes, shifting page breaks, and repositioning graphics. Ensure consistent spacing and font sizes. Then export each language version as a PDF with tag structure enabled (e.g., from InDesign via “PDF with tags”).

Step 4: Improve accessibility. Open the PDF in Adobe Acrobat Pro. Use the Accessibility Checker to check for tags and correct the reading order in the tag tree. Set a language marker for each page and add missing alternative texts. Repeat the check until no errors are reported.

Step 5: SEO metadata. In the document properties of each language version, add a descriptive title, description, and keywords in the respective language. Ensure the file name includes the language (e.g., report_2024_EN.pdf). Link the PDFs from your website using the hreflang attribute.

Step 6: Print optimization. For the print version, convert the PDFs to PDF/X format (e.g., PDF/X-4). Verify that all colors are in the target color space and image resolution is at least 300 dpi. Add bleed allowances if necessary.

Step 7: Quality assurance. Have each language version proofread by a native speaker. Perform a technical test with a current screen reader (e.g., NVDA or JAWS) and ensure the reading order is logical. Print a sample on the target device.

With this systematic process, you avoid typical errors and obtain a PDF that meets all requirements.