Onscreen keyboard for Mac OS Sierra? I checked the obvious places which are in settings for keyboard and also for language because I read that somewhere. This is a Mac Mini from 2011 if that makes a difference. Thanks for your help.
Go to System Preferences > Keyboard and check the Show keyboard and emoji viewers in menu bar:



This will alow you to use the keyboard viewer:



In the Keyboard System preference, click the Input Sources tab to choose alternate languages:



Click the Plus sign at the bottom:



Choose your desired languag(es):