This guide covers everything you need to know about updating your interface settings, managing OCR languages, and troubleshooting common installation issues. How to Change the Interface Language on Windows

Alternative Method: Reinstalling via Language-Specific Installers (For Older/Enterprise Builds)

: Click Apply , then OK . You must restart Nitro PDF Pro for the changes to take effect.

If you need to change the language for accessibility purposes (like screen readers or spell check), this is handled at the document level rather than the interface level: Open your PDF and go to File > Document Properties > Accessibility Select the correct language from the Document Language list and click Save the document to keep these settings. Troubleshooting Older Versions Setting the Document Language - Nitro PDF

Nitro PDF Pro (for Windows) Installation Guide – NLS Version

Click and then OK at the bottom of the window to save your changes. A prompt will appear informing you that the changes will take effect after a restart. Close Nitro PDF entirely and reopen it to see the new language applied. Method 2: Reinstalling Nitro PDF for Missing Languages

: In the left-hand category column of the Preferences window, scroll down and click Language .

Now you should be able to use Nitro PDF Pro in your preferred language!

Select Preferences from the bottom of the sidebar menu.

If the language reverts upon restarting:

If your goal is not to change the application interface, but rather the language property inside a PDF document (for screen readers), follow these steps: with Nitro PDF Pro. Go to File > Document Properties > Accessibility .

: Navigate to the official Nitro Downloads Page or the enterprise Nitro MSI Installer Directory.