Can't change language

I can't change the language on my 1040, the only option is English. On the device as well as in the connect app. When I setup the device for the first time I selected German as language, but at one point it was automatically changed to English. However I can't recall when that happened, maybe after an update. I have the latest version 19.22 and the latest connect(android) app version. I have my phone, that is linked with the edge, set up in English, but I guess that should not matter.

How can I change the language on the edge to something else than English?