All 7th generation DEVITA devices come in the German language as default as they are now manufactured in Germany. You cannot change the language using the DEINFO USB as you could with the older generation devices, but there is a simple way of doing this.
In order to change language on the new DEVITA AP, RITM and COSMO devices, simply hold the up and down scroll keys together and you will see the language that you wish to choose.
Keep doing this until the language of your choice appears, then stop pressing so it locks into place.
It’s really as simple as this!