Go to 'Settings ' Structure' and select the preferred language that you'd like to manage from the header menu.
From the 'Name in menu' field, you'll be able to change the title that this language is being displayed as in the language menu.
'Which language visitors see?' menu allows you to select the current language as a default for all the guests or lets the preference to be detected by location.
Lastly, give the website a new name from the 'Website title' field and once you've finished with the changes, click the 'Save' from the Voog user interface and your changes will be applied.