Method 3: Modifying the Shortcut Target (For FluidSIM 4 and Older)

This typically happens when settings aren’t saved properly. Go to Options > Save Settings Now after selecting your language. For version 3.6, ensure the English pack was installed correctly and the software wasn’t opened prematurely.

| Fluidsim Version | Best Method | | --- | --- | | 5.0 and newer | Extras → Options → General → Language | | 4.x | Flag icon on start screen | | Any version (advanced) | Edit FluidSIM.ini in %AppData%\Festo | | Very old (3.x) | Windows Registry (HKCU\Software\Festo) |

Click on Program Properties or Global Options from the drop-down menu.

While some elements change instantly, it is highly recommended to close FluidSIM and reopen it. A fresh launch ensures that all library components, technical descriptions, and help files update to the newly selected language. Method 2: Modifying the Installation or Configuration Files