Go to the folder where Pro100 is installed (usually C:\Program Files\PRO100). Find a file named PRO100.ini and open it with Notepad.
Select your preferred language (e.g., English, Polish, Russian, German). Pro100 Change Language
For most recent versions of Pro100, you can find the language settings within the main configuration menu. Launch Pro100 on your computer. Go to the folder where Pro100 is installed
If you cannot navigate the menus because you don't understand the current language, you can force the change through the initialization file. Close Pro100 completely. Pro100 Change Language