change LOCALE

Hi

# localectl returns the value I want: de_CH.utf-8.
But #locale does not, it's all en_US.utf-8. How can I change that?
Output #locale:
LANG=en_US.utf-8
LC_CTYPE="en_US.utf-8"
LC_NUMERIC="en_US.utf-8"
LC_TIME="en_US.utf-8"
LC_COLLATE="en_US.utf-8"
LC_MONETARY="en_US.utf-8"
LC_MESSAGES="en_US.utf-8"
LC_PAPER="en_US.utf-8"
LC_NAME="en_US.utf-8"
LC_ADDRESS="en_US.utf-8"
LC_TELEPHONE="en_US.utf-8"
LC_MEASUREMENT="en_US.utf-8"
LC_IDENTIFICATION="en_US.utf-8"
LC_ALL=en_US.utf-8

Thanks for help
filz51

LMGTFY 

https://www.cyberciti.biz/faq/how-to-set-locales-i18n-on-a-linux-unix/