For some reason, on my Pioneer box, the language was changed to English, although I haven’t been doing anything with the Freedombox, it apparently occurred via the automatic updates.
Besides, I am currently unable to find any language settings in Plinth (I also could not find that in the documentation). In my recollection, I chose the language at the initial installation and never looked at it afterwards.
Can someone indicate me where it is in Plinth?