Other forms: Germans
If something is German, it comes from the country of Germany. If you move there, you'll want to learn at least ein bisschen of the language, also called German.
As well as Germany, most people in Austria, Belgium, Liechtenstein, Luxembourg, and Switzerland speak at least some German. When you refer to someone who was born in Berlin or Munich, you can also call them a German. As an adjective, this word describes things made in Germany (a German clock) or associated with Germany (a German Shepherd). Germans, on the other hand, describe themselves as Deutschen, residents of Deutschland.