Ensure the program is completely closed and not running in the background. Open Run Dialog: Press Windows Key + R on your keyboard.

In the Options dialog box, look for a folder titled General or similar on the left-hand pane. Within General, look for a Language dropdown menu.

Concise checklist

When you buy or download ACDSee, you typically download a specific installer (e.g., English, German, French, or Japanese).

By following the methods outlined in this guide—whether the standard file replacement, the more precise "trial-to-full" technique, or the robust registry-swapping method—you can successfully adapt the software to your language. Remember that clearing the program's caches is the most critical troubleshooting step if your changes don't take effect immediately. With the right preparation and approach, you can unlock the full potential of ACDSee in the language you are most comfortable with.

Click on Tools in the top menu bar and select Options... (or press Ctrl+Shift+O as a shortcut).

Changing the language in ACDSee is a relatively simple process. Here are the steps: