1. Be sure to be the "admin" in your Sellf team;
2. Go to www.sellf.io and log in with your email and password;
3. Click on your profile at the upper right of the view to open the drop-down menu
4. Click on "Settings";
5. Here you should see "Language". Open the drop-down menu and choose "English".
6. Click "Save" to confirm.
On your mobile apps the language depends on the language set in your device Settings.