You can switch the display to English by selecting "English" from the menu.
For other languages:
Each language can be supported by editing the language file "language.txt".
Rewrite the inside of the round brackets in the language file with that language notation and place the language file in the same folder as the program.
Then you can start the program in that language display.
You can also change the language display by selecting that language file from the menu.
In that case, the file name of the language file is optional.