To pick the default language of your TalentLMS portal, go to the "Basic Settings" tab at the "Accounts and Settings" page, and change the respective setting (1) in the "Locale" section.
End-users are also allowed to change this setting and pick a different language for their TalentLMS interface.
All they need to do is go to the "Info" tab at their profile page (2)
and choose their preferred language from the respective drop-down menu (3)
By updating their profile, all changes in the menus and other standard text are activated immediately.