As you may noticed, Rolisteam is translated in several languages.
When you start Rolisteam, it automatically recognizes the language of your system.
It loads the appropriated translation file, when available.
Change the language
You may force rolisteam to load one specific file. To do that, you have two ways:
Preferences > Translation File > [...]
Browse to the translation file, then press OK and restart the application.
Parameter at start up:
./rolisteam -t /path/to/translation/path
For more details, please review this page