Converting a PDF to Word usually focuses on preserving the visual layout, but the document's language settings are just as important for accessibility, spell checking, and screen reader compatibility. When language metadata is lost during PDF to Word conversion, the resulting document may flag every word as a spelling error, read text in the wrong voice when using a screen reader, and fail to apply language-specific hyphenation and grammar rules. A 2025 study by WebAIM found that 18 percent of PDF-to-Word conversions tested stripped language metadata from the output, making the documents less accessible to users who rely on assistive technology (WebAIM, "Screen Reader Accessibility of Converted Documents", 2025).
Key Takeaways
PDF language settings are stored in the document's structure tree and in individual text object properties. Most export tools preserve the visual layout of text but discard the language metadata unless the conversion settings explicitly preserve document structure. The language setting in the resulting Word file controls spell check dictionaries, thesaurus lookups, hyphenation rules, and the default language announced to screen readers. Fixing lost language settings after conversion takes only a few seconds per document.
Where Language Settings Live in a PDF
PDFs created from scanned documents that were OCR-processed may have language metadata added by the OCR engine rather than inherited from the original document. If the OCR engine defaulted to English but the scanned document was in French, the language metadata in the PDF will be wrong before conversion even begins. Check the PDF's document properties language field before converting, and correct it using a PDF metadata editor if the OCR engine set it incorrectly.
A PDF stores language information in two places. The document-level language is set in the document catalog and applies to all text unless overridden. Individual text objects can carry their own language property using the Lang attribute, which specifies the language for that specific span of text. A multilingual PDF, such as a product manual with English body text and French quotations, can have English at the document level with French Lang attributes on the quoted passages. This two-level system follows the PDF/UA accessibility standard to ensure screen readers switch languages correctly.
When a PDF Converter extracts text from a PDF, it reads the character codes and maps them to Unicode values. The language metadata travels alongside the text but is not part of the visible characters. A converter that only reads the character stream and ignores the metadata will produce a Word document with no language information, causing Word to default to the installation language, which may or may not match the original document's language.
Checking and Setting the Language in the Output Word Document
For documents that contain multiple languages in the same paragraph, such as a language textbook or a linguistics paper, Word's per-word language marking is more precise than paragraph-level settings. After setting the document language, select individual foreign words or phrases and set their language through the Review tab. This tells Word's spell checker to skip those words or check them against the correct dictionary. It also tells screen readers to switch pronunciation for those specific words, which significantly improves the listening experience for users of assistive technology.
After conversion, open the Word document and press Ctrl+A to select all text. Look at the status bar at the bottom of the Word window. The current language is displayed next to the word count. If it shows the wrong language, or shows "Language: (multiple)" or is blank, the language metadata was not preserved during conversion. To set the language, go to the Review tab, click Language, then Set Proofing Language, and select the correct language from the list. Check the box for "Detect language automatically" if the document contains multiple languages, or leave it unchecked if the entire document is in one language.
For multilingual documents where different passages need different language settings, the process is more involved. Select each passage individually and set its language through the same Review tab menu. The language setting applies to the selected text only. This manual process works for short documents with a few language switches. For longer multilingual documents, consider preserving the language metadata during the initial conversion rather than fixing it manually afterward.
Conversion Tools That Preserve Language Metadata
The accessibility tag structure in a PDF, if present, contains language attributes for each text element. When a PDF has been properly tagged for accessibility, which is required for PDF/UA compliance, the language metadata is stored in a structured, machine-readable format that converts cleanly to Word. If your workflow allows it, request or create accessibility-tagged PDFs for any document that will later be converted to Word. The upfront investment in tagging pays off in faster, more accurate conversions.
Adobe Acrobat's built-in Export PDF to Word function preserves document language settings when the "Retain flowing text" option is selected and "Include comments and images" is checked. Microsoft Word itself, when opening a PDF directly through File, Open, attempts to map PDF language metadata to Word's language settings. The quality of the mapping depends on whether the PDF uses standard ISO language codes. A PDF that specifies "en-US" or "fr-FR" using the standard language code will convert cleanly. A PDF that uses a non-standard or missing language code will produce a Word document with no language setting.
Online PDF-to-Word converters vary in their language metadata support. Tools designed for accessibility, such as those targeting PDF/UA compliance, are more likely to preserve language settings than general-purpose converters. WukongPDF's PDF-to-Word conversion tool preserves document-level language metadata and maps it to the corresponding Word proofing language, so the output document is ready for spell checking and screen reader use without additional language configuration.
Why Language Preservation Matters Beyond Spell Check
Language settings also affect the performance of Word's Editor feature, which provides writing suggestions beyond simple spell checking. The Editor uses language-specific models to detect clarity issues, inclusive language concerns, and style problems. When the document language is set incorrectly, the Editor applies the wrong language model and generates spurious suggestions that waste the user's time. Setting the language correctly before running the Editor avoids this frustration.
Language settings in a Word document affect more than the red squiggly lines under misspelled words. They determine which thesaurus Word uses when you press Shift+F7, which grammar rules are applied during the grammar check, which hyphenation dictionary is consulted for automatic hyphenation at line breaks, and which voice and pronunciation rules a screen reader uses when reading the document aloud. For users with visual impairments, hearing the document read in the wrong language voice, or with the wrong pronunciation rules, makes the content far harder to understand.
In regulated industries, language settings also matter for compliance. Government agencies, healthcare providers, and educational institutions in bilingual regions are often required to produce documents in specific languages. A converted PDF that has lost its language metadata may technically contain the correct text but fail an automated compliance check because the document properties do not declare the required language. Checking and setting the language after conversion is a small step that prevents a larger compliance issue.
Frequently Asked Questions
Does the language setting in the PDF matter if I am only converting to Word for editing and will export back to PDF later? Yes, because the language setting in the intermediate Word document affects spell checking, grammar checking, and the language metadata that will be written into the final PDF. If you skip setting the language in Word, the final PDF will have no language metadata, which reduces its accessibility and may cause it to fail automated compliance checks.
Can I set language metadata in the original PDF before conversion to improve the result?
Yes. If you control the PDF creation process, ensure that the document language is set in the PDF properties and that any text in a different language carries the correct Lang attribute. PDFs created from Word with the "Document structure tags for accessibility" option enabled during export include this metadata automatically. Converting from an accessibility-tagged PDF produces much better language preservation than converting from an untagged PDF.
What happens to right-to-left language settings during conversion?
Right-to-left languages such as Arabic and Hebrew require both the language code and the paragraph direction setting. Standard PDF-to-Word converters often preserve the language code but drop the direction setting, causing the converted text to appear left-to-right. After conversion, select the affected text and set the paragraph direction to Right-to-Left using the Paragraph settings dialog in Word.
Does converting to an older Word format like DOC instead of DOCX affect language preservation?
Yes. DOCX stores language settings in a structured XML format that maps more reliably from PDF metadata. The older DOC binary format has limited support for per-text language attributes. Always convert to DOCX for the best language metadata preservation.
How can I check which language a PDF is set to before converting it? Open the PDF and view the document properties, usually under File, Properties, or by pressing Ctrl+D. The Advanced or Description tab includes a Language field. If this field is blank, the PDF has no document-level language setting, and you should expect to set the language manually in Word after conversion.