German keyboard

Normally you should be able to see an icon in the top right corner of your screen that indicates which keyboard layout is active.

Write in another language on your Mac - Apple Support

CLHC62 wrote:

How do I set up a second keyboard which has German letters and symbols? I can get it to type but the letters/symbols are not the correct German ones.

You need to go to system preferences > keyboard > input sources and make sure you have only the right German input source on the list. Newer keyboards with @ printed on the Q key need the input source "German Standard. " Older ones with @ printed on another key need "German." Tell us what kind of keyboard you have.