The Home screen is a dashboard where you can enable automatic translation and perform other functions
On the Home tab of the direct message (DM) channel with @Translate you will find a menu of buttons and a list of enabled Automatic Translation rules/settings:
The "Home" tab of the DM with @Translate
The Settings button is the default view of the home screen which enables you to:
Choose Your Language which will be used as the default language when using the Translate this message function