If your local system language is supported by Game Hub, the app will be presented in that language. We are Swedish and know how frustrating it can be to be googling certain settings and getting zero accurate results. So, to start the app in English you will have to do a little workaround.
- Right-click on the Game Hub desktop icon and go to Properties
- Go to Shortcut
- Go to the field for Target
- After \TobiiGameHub.exe add: --testLocalization en-US so it looks like this: